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One could say that 2014 first-round draft pick Casey Gillaspie was born to play baseball.

The Tampa Bay Rays selected Gillaspie out of Wichita State with the No. 20 overall pick this past June, targeting the switch-hitter’s advanced approach and big-time power. Plus, it certainly didn’t hurt that he also came from a baseball family.

Gillaspie’s father, Mark, was an All-American outfielder at Mississippi State before spending eight years in the minor leagues, reaching the Triple-A level with two different teams before hanging up his spikes after the 1988 season.

Though he never played in the major leagues, Mark still had a solid eight-year career, batting .287/.421/.503 with 138 home runs, 604 RBI and more walks (692) than strikeouts (676) in 880 games.

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Twitter erupted Saturday night following news that Kris Bryant was pulled during the middle of Triple-A Iowa’s game. He didn’t appear to suffer an injury in the game, which only fueled speculation that the 22-year-old slugger was headed for The Show.

Unfortunately, it was learned soon thereafter that Bryant departed the game after aggravating a left-foot injury suffered earlier in the week, when he fouled a ball of his big toe, and would undergo an MRI the following day.

And just like that, the excitement regarding Bryant’s potential call-up shifted to concern about the injury. With less than a month left in the minor league regular season, any injury requiring a trip to the disabled list would likely kill his chances of receiving a September promotion.

Thankfully, the MRI revealed no structural damage to Bryant’s foot. The Cubs’ top prospect returned to the lineup Tuesday.

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With rosters set to expand from 25 to 40 players on Sept. 1, it's only a matter of time until there's an influx of fresh, young players arriving in the major leagues.

We previously looked at the call-up odds for baseball's top-ranked prospects as well as those prospects considered to be long shots for a promotion next month.

Today, however, we'll be breaking down another batch of prospects who could be in the major leagues by the end of the year, provided they turn strong finishes to the minor league season at their respective levels.

With that being said, here are seven prospects making a late push for a September call-up based on their performance so far this season.

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Apparently 10 is the magic number for Corey Kluber.

The Cleveland Indians ace was brilliant on Friday night against the Baltimore Orioles, allowing one run on five hits and two walks while striking out 10 batters over 7.2 innings.

The outing marked Kluber’s second 10-strikeout performance in the past week, and he’s now fanned exactly 10 batters in four of his last six starts. Overall, it was Kluber’s eighth start this season with double-digit strikeouts.

Kluber, 28, has been nothing short of dominant since the All-Star break, pacing all starting pitchers with a 0.76 ERA, 0.69 WHIP and 55 strikeouts over 47.2 innings. On top of that, the right-hander has allowed just 27 hits, none of which have left the park, and six walks during that span.

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While there already has been a large influx of prospects promoted to the major leagues this season, there are even more set to arrive when active rosters expand from 25 to 40 players on September 1.

For teams still vying for a postseason berth, the timely promotion of an impact prospect for the stretch run can provide a much-needed boost to their lineup, starting rotation or bullpen. Meanwhile, teams already out of the playoff hunt use the final month of the regular season to audition some of their top prospects.

Last year’s wave of September call-ups marked the arrival of some of baseball’s most exciting prospects such as speedster Billy Hamilton and the flame-throwing Yordano Ventura.

This year there are even more high-profile talents seemingly in line for a promotion in September, with slugger Kris Bryant, defensive wunderkind Francisco Lindor and toolsy outfielder Joc Pederson each knocking on the door of the major leagues.

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The Washington Nationals are feeling it.

On Thursday night, the Nationals completed a three-game road sweep of the New York Mets, winning 4-1 behind a dominant start from Stephen Strasburg and home runs from Adam LaRoche and Bryce Harper.

The win was Washington’s 11th straight at Citi Field as well as its sixth in the last eight games, and the Nationals now hold a six-game lead over the Atlanta Braves in the National League East with a 66-53 overall record. And considering how well the Nationals have played over the past month, it’s starting to seem as though the team could run away with the division.

The Nationals and Braves entered the All-Star break tied atop the NL East standings, but the two teams since have trended in opposite directions, clearly.

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The 2014 season has seen a number of notable prospects receive call-ups to the major leagues. Undoubtedly, there are more to come—and soon.

Highly regarded youngsters like Marcus Stroman, Jonathan Singleton, Gregory Polanco and Ken Giles have been seeing regular time for their respective clubs for quite some time now. Others, like Oscar Taveras and Taijuan Walker, have been shuttling up and down between the minors and majors for much of the year.

With the trade deadline further in the rearview mirror, the next notable portion of the season that will affect top young talent is the September 1 roster expansion from 25- to 40-man rosters, which should allow for plenty of promotions of prime prospects.

Already in the past week or so, the Minnesota Twins brought up righty Trevor May for his debut, and the same happened for Arizona Diamondbacks third baseman Jake Lamb, San Diego Padres outfielder Rymer Liriano and Washington Nationals outfielder Michael Taylor.

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When a highly touted draft pick gets off to a slow start as a professional, we tend to draw hasty conclusions about his long-term potential or assume that something was missed in the scouting process.

The reality is that most prospects will struggle at some point during their ascent toward the major leagues. For some guys, however, that just happens earlier than expected.

When evaluating the early returns from recent draft picks, it’s important to remember the impact small sample sizes have on players’ numbers, and that those numbers are a weak indicator of his overall potential or career trajectory. After all, it will be several years until a majority of the players from this year’s class are even ready for the major leagues.

With all that being said, here are five prospects from the 2014 draft class who have struggled in their professional debuts.

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FRISCO, Texas — Joey Gallo, the Texas Rangers’ hulky Double-A third baseman, described leading the minor leagues in home runs last season as “kind of a one-of-kind thing,” then shrugged indifferently at the prospect of repeating the feat this year to become the first to do so since 1972-73 (note: Kevin Witt played in Japan in 2005, leading the minors in homers in 2004 and 2006).

“It doesn’t really matter to me,” the 6’5”, 230-pounder said one afternoon last week while seated in the Frisco RoughRiders’ dugout. Entering Wednesday's play, the 20-year-old has belted 38 homers between Frisco and Myrtle Beach of the High-A Carolina League. That is good for just one behind Kris Bryant, third baseman for the Chicago Cubs’ Triple-A Iowa club in the Pacific Coast League. Bryant hit No. 39 on Tuesday evening.

Gallo said his sole interest in the race is competing with a familiar face from back home in Las Vegas. The 22-year-old Bryant played alongside Gallo’s older brother while growing up, and their fathers work together operating a baseball instructional school.

Gallo would become the first to go back to back with minor league home run crowns since Jim Fuller of the Baltimore Orioles organization, and Fuller played at Triple-A and Double-A those years. It’s difficult to say that would earn more fame than hitting a promotional Chevy truck during batting practice before this year’s All-Star Futures Game at Target Field in Minneapolis.

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The Oakland A’s put an end to the Kansas City Royals’ eight-game winning streak on Tuesday night, as they exploded for 11 runs on 20 hits to back another strong outing from left-hander Jon Lester.

But the A’s star of the game was third baseman Josh Donaldson, who went 3-for-4 with a pair of late-inning home runs and four RBI—one of his finest performances of the season.

Donaldson’s second homer, which came in the eighth inning off left-hander Bruce Chen, was his 25th of the season, a new career high for the 28-year-old All-Star after hitting 24 during his breakout 2013 campaign.

And with slugger Yoenis Cespedes and his 17 home runs with Oakland no longer in the picture, the A’s will need Donaldson to fill his shoes in the power department down the stretch.