Fantasy Baseball: Under the Radar - National League Only (Week 18)

Each week Baseball Press will be providing some Under the Radar fantasy players for NL-Only Leagues, AL-Only Leagues and Mixed Leagues. These articles will be dedicated to finding those diamonds in the rough on the waiver wire that will either be a short term or long term replacement for an injured or struggling player on your fantasy team.

It is quite possible that some names will be added to this list once Saturday afternoon comes and goes but these are the guys to roll with at the current time.

Make sure you keep your eyes on the transaction line to make sure if a gem switches leagues that you are able to pick him up if you have a hole to fill.

Chris Snyder - C, Pittsburgh Pirates (Yahoo! 5%, CBS 13%)

Well if Snyder stays put in the Steel City, where he is right now, then he is a must add in NL formats now that Ryan Doumit is on the DL and he will be put right back into the starting role.

When he was the number one guy in Arizona earlier in the year he hit nine home runs with a .439 slugging percentage. Pretty good numbers even with the hit to your team's average.

Logan Morrison - 1B/OF, Florida Marlins (Yahoo! 2%, CBS 21%)

Morrison was absolutely tearing up Triple-A pitching, hitting .325 with five home runs over just 188 at-bats.

The five home runs don't seem like a big total, but over only 188 at-bats, that is pretty solid.

Morrison probably had a chance to bump Gaby Sanchez at the beginning of the year if he wasn't hurt. With word that Chris Coghlan will take over at third base upon his return from the DL, it looks like Logan has clear playing time and at-bats.

Brett Wallace - 1B/3B, Houston Astros (Yahoo! 1%, CBS 27%)

In the rash of moves that Houston has made leading up to the deadline they have picked up "journeyman"—can you call someone who has yet to see MLB time a journeyman?—third baseman, soon to be first baseman Wallace.

Wallace has seemed to turn teams off by his work ethic in the field and his lack of attention to diet and staying in shape. If this can change in Houston he should be a pretty prolific power bat, even though he hits from the left side of the plate.

Jon Jay - OF, St. Louis Cardinals (Yahoo! 7%, CBS 11%)

Manager Tony LaRussa was on record saying that the Cardinals would find Jay at-bats even after Ryan Ludwick came off the DL. That was a huge boost of confidence for the young outfielder.

Now that it appears that Ludwick is no longer a Cardinal the door is wide open for Jay to be the starting right fielder for the remainder of the 2010 season.

He does have a very high BAbip—close to .450—but he also hits a lot of line drives and seems to have successfully already passed the first adjustment period at the plate.

Aaron Heilman - RP, Arizona Diamondbacks (Yahoo! 7%, CBS 8%)

With one less arm vying for saves in the desert with the departure of Chad Qualls, it appears that Heilman would be your best bet to pick up to get some saves late in the season.

His peripherals haven't been stellar, but when two or three saves can make the difference of a point or two in a roto league you can absorb the minute bump in WHIP and ERA to collect those counting stats.