Every MLB Team's One Prospect Who Will Benefit Most from Call-Up

In baseball, September means roster expansion and a clearer playoff picture by the day as we move towards the postseason.

While roster expansion helps contending teams bolster their rosters from within their organization, it also provides young players with an audition for starting roles in the coming season.

So here is a look at the one prospect for each team that has the most to gain from a September call up, the player who could boost his stock within the organization the most with a good final month.

Arizona Diamondbacks: Jarrod Parker

The Diamondbacks have a trio of young pitchers who could make them a serious contender within a few seasons in Tyler Skaggs, Jarrod Parker and this year's first-round pick Trevor Bauer.

Skaggs is still just 19 years old, and Bauer has not exactly set the world on fire at Double-A, with a 7.56 ERA in four starts. However, the 22-year-old Parker has been dominant with an 11-8 record and 3.88 ERA, and coming off of Tommy John surgery last year, he could be in line for a rotation spot next year with a strong September.

Atlanta Braves: Julio Teheran

The Braves have an incredible amount of young starting pitching talent, but no one has a higher ceiling than 20-year-old Julio Teheran, and there is a reason he is perhaps the top pitching prospect in all of baseball.

While he struggled in two starts earlier this year, he has owned Triple-A hitters to the tune of a 15-2, 2.22 ERA, 121 Ks line, and while he may find himself in the bullpen for the stretch run, they could very well be part of the rotation to open 2012.

Baltimore Orioles: Ryan Adams

Now that the Orioles have called up their promising young pitchers, their prospect pool is relatively thin as far as big league ready minor league talent goes.

However, second baseman Ryan Adams performed well in limited action earlier this season and was called up again on August 22, and he has gone 12-for-36 since then. With Brian Roberts recurring injury problems, Adams could set himself up as the second baseman of the future and of now with a strong final month.

Boston Red Sox: Ryan Lavarnway

Lavarnway has proven to be among the best power-hitting prospects in all of baseball after hitting 73 home runs over the past three seasons, including 30 so far this season.

He earned a call-up two weeks ago, when Kevin Youkilis hit the disabled list, and before being sent back down, he went 7-for-23 over seven games. He will no doubt be back up shortly, and while Jarrod Saltalamacchia has played well, there is no doubt Lavarnway would represent an upgrade if his minor league success carries over to the big leagues.

Chicago Cubs: Bryan LaHair

The Cubs are on their way to a wide scale overhaul as they begin rebuilding with some of their big contracts coming off the books.

Many believed when the team signed Carlos Pena to a one-year deal that they were setting themselves up to be players for Albert Pujols or Prince Fielder this offseason.

While that may still be true, Triple-A slugger Bryan LaHair will get a long look this September, and the first base job could in fact be his next season, as he has hit .331 BA, 38 HR, 109 RBI this season at Triple-A, and while he is 28 years old, he would represent a low-cost power option.

Chicago White Sox: Dayan Viciedo

After an impressive 38 game audition last season in which he hit .308 BA, 5 HR, 13 RBI, Viciedo got buried in Triple-A this season for one reason or another. Instead, the under performing trio of Brent Morel, Mark Teahen and Omar Vizquel got the third base at bats.

He has been back in the major for four games this season, and he is off to a hot start at 7-for-13 with a home run and four RBI. There is no reason he should not be the front runner to open the season at third base in 2012 if the production continues, as Morel seems to have blown his chance.

Cincinnati Reds: Devin Mesoraco

With Ramon Hernandez and Ryan Hanigan in the big leagues and top prospects Devin Mesoraco and Yasmani Grandal nearly ready in the minors, many believed the Reds would trade one of them at the deadline.

Instead, Hernandez will hit free agency at season's end, and while Hanigan is a solid backup, the team would certainly prefer Mesoraco slide into the starting role next season. He has hit .289 BA, 15 HR, 71 RBI at Triple-A this year and should have no trouble adjusting to big league pitching.

Cleveland Indians: Jeanmar Gomez

The Indians have called up a number of their top prospects already this season, and 23-year-old Jeanmar Gomez started on Tuesday to make his fourth stint with the big league team.

He has enjoyed success at every level of the minor leagues, and if he can put together a few more starts like his last one, in which he went six innings and gave up just one unearned run, he could lock down a rotation spot in 2012.

Colorado Rockies: Wilin Rosario

It has become evident that Chris Iannetta is not the answer at catcher for the Rockies, as he has never been able to build off a strong 2008 season, and while he is signed through 2012, it is never too early to start looking for his replacement.

Top prospect Wilin Rosario was a Futures Game participant, and even though he is only 22 years old, he is currently in his sixth pro season, and with a .250 BA, 19 HR, 44 RBI line, he is no doubt auditioning for a starting job next season.

Detroit Tigers: Jacob Turner

The Tigers' top prospect and one of the best pitching prospects in all of baseball, 20-year-old Jacob Turner, was given a spot start earlier this season and went 5.1 innings giving up two runs on three hits and striking out six.

Despite his young age, he should get a spot look down the stretch for the Tigers, be it in the rotation or in the bullpen, and he could be on his way to a rotation spot as early as next year if he impresses.

Florida Marlins: Matt Dominguez

Since selecting him 12th overall out of high school in the 2007 MLB draft, the Marlins have had Matt Dominguez on the fast track to the big leagues, and this season, he has advanced from High Single-A all the way to Triple-A.

He is still not quite there, as he has a line of .246 BA, 12 HR, 57 RBI this season, but the team would like nothing more than for him to be their starting third baseman in 2012, as the team has a big hole there. He's currently injured, but he should be healthy in time for a September audition, and playing well could mean breaking camp with the team next year.

Houston Astros: Brett Wallace

Given the starting first base job to open the year, many were surprised when the Astros sent Brett Wallace down at the end of July despite a decent .268 BA, 4 HR, 26 RBI line.

Since that demoting, he has torched Triple-A pitching with a .356 average and 24 RBI in 28 games. Carlos Lee has been getting the bulk of the playing time at first base, and his days of playing outfield could be over, so it will be interesting to see how the Astros work Wallace back into the lineup.

Kansas City Royals: Lorenzo Cain

Acquired as part of the Zack Greinke trade this past off season, Cain impressed in a 43-game stint with the Brewers last season with a .306 average over 147 at bats.

The Royals are short on outfield talent in their minor league system, and Cain certainly factors into their future plans as he has hit .317 BA, 16 HR, 80 RBI, 16 SB at Triple-A. He will be 26 next season, so he may no longer be considered a prospect, but he could certainly make an impact next season with the big club.

Los Angeles Angels: Jeremy Moore

There is no question that Mike Trout is the most talked about outfielder in the Angels system and perhaps in all of baseball, but their current Triple-A right fielder Jeremy Moore is no doubt more big league ready right now and should be in line for a September audition.

He has tallied double-digit home runs and steals each year since 2007 while advancing quickly through the system, and this year has been another great one, as he is currently hitting .298 BA, 15 HR, 66 RBI, 21 SB. With Torii Hunter and Vernon Wells locked up for the next few seasons, it will take a good September for him to earn playing time in 2012.

Los Angeles Dodgers: Jerry Sands

Injuries forced the 23-year-old Sands into action early this season, and he hit .200 BA, two HR, 17 RBI over 41 games before being sent back down to Triple-A.

However, he has been great since then, with a .284 BA, 28 HR, 85 RBI line in 87 minor league games.

Sands should be in line for at least an opportunity at the everyday left field job next season, and the trio of Sands, Matt Kemp and Andre Ethier could make for one of the best young outfields in the league moving forward.

Milwaukee Brewers: Mat Gamel

The Brewers have distanced themselves from the rest of the pack in the NL Central, and they could be a dangerous team come October thanks to their impressive mix of offense and starting pitching.

Come September, that offense should get even better, as corner infielder Mat Gamel will no doubt be called up and put in position to be one of the team's top hitters off the bench.

With a line of .320 BA, 28 HR, 96 RBI at Triple-A this season, he is once again raking, and while the team has struggled to find a place for him over the past few years, he is certainly a candidate to replace Prince Fielder in 2012 if the team is unable to retain him.

Minnesota Twins: Kyle Gibson

The Twins selected Kyle Gibson with the 22nd overall pick in the 2009 draft, and in his first pro season in 2010, he went 11-6 with a 2.96 ERA over three minor league stops as he eventually reached Triple-A.

This season, he has not quite enjoyed the same success, as he has posted a 4.81 ERA over 18 Triple-A starts. However, he has been on the fast track and could be a part of the rotation next season with a strong September showing, and he will no doubt be given a chance.

New York Mets: Fernando Martinez

Originally signed in 2006 at the age of 17, Martinez is in his sixth pro season and his third season at the Triple-A level.

He has fallen down the prospect ranking over the past few years, as his development has halted and he is hitting just .260 BA, eight HR, 30 RBI this season.

He has earned a cup of coffee the past two seasons and appeared in 11 games with the big league club earlier this season.

While he is still just 22, proving something this September may be necessary for him to remain a future starter candidate, and with that on the line, he could have a big September.

New York Yankees: Jesus Montero

Montero has been at the center of trade rumors all season, but the Yankees have held onto him despite those rumors and the No. 3 prospect in all of baseball, and he will be making his Yankees debut as he was called up today.

With Eric Chavez currently serving as the team's DH, Montero could at the very least split at bats in a platoon with him, and if he performs well, could find himself in the starting lineup on a regular basis down the stretch.

The Yankees could also give stud pitching prospects Manny Banuelos and Dellin Betances a look this September, but Montero is in the best position to not only make an impact now but also to be an everyday player in 2012.

Oakland Athletics: Grant Green

The Athletics have a promising-looking infield moving forward, with Jemile Weeks at second base and top prospect Chris Carter in line for a long look this September at first base.

Joining them could be 2009 first-round pick Grant Green.

His offense has never been a question, with a .318 BA, 20 HR, 87 RBI line last year and now in his first year at Double-A, Green has hit well once again. However, he has continued to struggle defensively with 21 errors after 37 last season.

He'd need to be added to the 40-man roster, but that is an inevitable this coming offseason anyway, so he could be in line for a September audition and a potential competition with Cliff Pennington for the shortstop job next spring.

Philadelphia Phillies: Domonic Brown

Originally slated to take over in right field for Jayson Werth to open the 2011 season, injuries and ineffectiveness have put a damper on a year that many thought would end in the NL Rookie of the Year for Domonic Brown.

The team has since traded for Hunter Pence in right field, and Raul Ibanez is no longer slumping badly, so Brown is not in line to start but should still get some playing time down the stretch for the NL favorites.

However, he is still the heir to Raul Ibanez in left field, and the team would certainly like to see the player they were expecting all along make an appearance this spring.

Pittsburgh Pirates: Pedro Alvarez

The Pirates have fallen off after their impressive start, but there is little question that the franchise is heading in the right direction and should only get better in the years to come.

Entering the season, much was expected from young third baseman Pedro Alvarez, who tallied a .256 BA, 16 HR, 64 RBI in just 347 at bats. However, he slumped to a .196 line over the first 56 games of the season before injuries and ineffectiveness led to him being demoted.

He returned at the end of July, but it was much of the same and he was demoted again. Alvarez is a big part of the Pirates future plans, and a strong final month of the season would be huge for his confidence heading into 2012.

San Diego Padres: Anthony Rizzo

As one of the key pieces in the deal that sent Adrian Gonzalez to the Red Sox, Rizzo should get a chance to show what he can do this September, even though he is still just 21 years old.

He played in 35 games for the Padres earlier this summer, hitting .143 BA, one HR, six RBI before being sent back down, but he has been dominant at Triple-A with an amazing .345 BA, 26 HR, 101 RBI in just 336 at-bats.

Look for him to start making Padres fans forget about Gonzalez this September, but he'll have a long way to go to reach the level of production he was at.

San Francisco Giants: Brandon Crawford

The shortstop position has been a revolving door of sorts over the past few seasons for the Giants, and this season has been no different. Earlier this year, Brandon Crawford got an extended look and hit just .190 over 50 games.

Moving forward, the team has no clear cut future starter, and with a fairly weak free agent market outside of Jose Reyes, Crawford could secure himself a starting spot for next season with a good final month. However, he will have to battle Orlando Cabrera for at bats.

Seattle Mariners: Alex Liddi

Signed as an amateur free agent at the age of 17 out of Italy, Liddi has emerged as a serious power threat over the past few seasons, hitting 71 home runs over the past three seasons as he has moved through the ranks.

Liddi has seen time at first, third and shortstop this season, and if he can put together a strong September, the Mariners will find a way to get his bat into the lineup one way or another, as the 22-year-old certainly has potential.

St. Louis Cardinals: Shelby Miller

The Cardinals have been very careful with Shelby Miller, taking him along slowly since selecting him 19th overall out of high school in the 2009 draft.

He spent his first two pro seasons in Low Single-A and started this year at High Single-A.

However, he has gotten his first taste of Double-A this season and not missed a beat, going 8-3 with a 2.97 ERA, and with the Brewers pulling away in the NL Central, the Cardinals could give the flame-thrower a call-up to help their late-season push. Not only that, but with Chris Carpenter's future in doubt, he may be looking at a rotation spot next year.

Tampa Bay Rays: Matt Moore

Taken in the eighth round of the 2007 MLB draft out of high school, Moore has emerged as perhaps the top pitching prospect in all of baseball, and his numbers this year could very well force his way into a September call-up despite him not being on the 40-man roster.

Moore has an 11-3 record and sterling 1.93 ERA to go along with 200 strikeouts in just 149 innings pitched.

He will be in line for a rotation spot next year, but the team may want to give him a late-season audition like they did with Jeremy Hellickson last season.

Texas Rangers: Leonys Martin

The Rangers have gotten through the season with the duo of Endy Chavez and Craig Gentry holding down the fort in center field, and while they have done a fine job, the recent injury to Nelson Cruz has opened things up in the outfield.

Signed to a $15 million deal this offseason after defecting from Cuba, Martin has risen through the ranks quickly in his first pro season, reaching Triple-A after starting the season in the Rookie League. He should be in line for some starts down the stretch, and could be a option to start in center field next season.

Toronto Blue Jays: David Cooper

The 17th-overall pick in the 2008 draft, Cooper earned a call-up earlier this season, but was sent back down after struggling to a .121 BA, one HR, five RBI line over 33 at-bats in 13 games.

However, he has been phenomenal at Triple-A all season with a .377 BA, nine HR, 95 RBI, and that will be enough for him to get a look this September and set himself up for a potential starting job next season if he can continue to produce at that level.

Washington Nationals: Stephen Strasburg

One of the biggest stories of last season, Stephen Strasburg took the baseball world by storm with his 14-strikeout debut performance and subsequent dominance.

However, as quickly as he appeared, he was gone, as an arm injury sidelined him and eventually resulted in Tommy John surgery.

He has made an impressively quick recovery and is on his way back to Washington for the season's final month. While the Nationals are out of contention, a return to form by Strasburg will give their fans some peace of mind and something to look forward to moving forward.