I'll do a position by position breakdown for you:
Matt Adams - If an injury should befall Lance Berkman boy oh boy you had best pounce, nice late round flier here. And come on at Lance's age, lezbehonest!
Alonso is the odds-on favorite to win the starting first-base job for the Padres this spring. He managed .296/.364/.478 rates for Triple-A Louisville the past two seasons combined, stuck there primarily because the Reds had Joey Votto entrenched at first base, and he managed impressive .330/.398/.545 numbers in a 47-game trial with the Reds late last season, primarily being used as a pinch hitter or in left field. A line-drive hitter with good plate discipline, Alonso might be the least risky of the 2012 rookie class in terms of batting average, and while Petco Park might suppress his power numbers, he could quickly earn the Padres' trust to the point where he might emerge as a No. 5 or 6 hitter. NL-only owners need to remember this name as a late-round sleeper.
James Loney - yeah sure he's not spectacular but won't kill you either, he is good source of RBI and BA from 1b or CI or a UTL slot, better than NOTHING!
Brett Wallace (should also gain 3b eligibility also) - nice late round flier on a potential starter and one capable of a nice campaign, perfect late round sleeper here.
Look to draft Aaron Hill (who people are down on): After his trade to Arizona, he hit .315-.386-.492 in 142 plate appearances with a 13.4% strikeout rate and a 8.5% walk rate. He is the starting second baseman for the DBacks this season, and we should see his power return in the hitters park that is Chase Field. I can see him hitting 20 HRs and stealing 12 bases in 2012. Not bad for a second baseman.
Mark Ellis - Well maybe 10 homers 15 SB and a solid but not spectacular BA can be a nice late round flier for a backup or a low end starter (better than nothing right?)
Andrelton Simmons (he is dazzling everyone this spring - he might make the jump just like Furcal did. In fact I'm beginning to think he's going to get a shot), Zach Cozart (good power hitting SS for the Reds) - younger version of JJ Hardy and toss in a few SB - nice late round sleeper here)
Rafael Furcal - Well he's older, but still got some left in the tank. he can hit and still run some so a BA around 280 a dozen homers and 20-30 SB is possible in a full season if he can stay healthy.
Ian Stewart - New team, fresh start - that's all a player needs sometimes. Everyone will avoid him, but you could use him as a b/u 3b or CI or 1st or 2nd utility player in NL only play and could be rewarded with 20-25 homers and 85ish RBI for your guts.
Jed Lowrie, SS-3B, Houston Astros - He will be under less pressure in Houston and his tendency to hit fly balls makes him well suited for Minute Maid Park. He has the potential to hit 20 homers and his multi-position SS-3B eligibility is an added bonus. Plus, playing for a rebuild team will take the pressure off allowing him to go out there and have fun.
Juan Uribe (2b/3b/SS) - ONe season removed from a waiver wire gem. He's got double digit power potential and should easily be a late round sleeper for deeper leagues.
Casey MacGahee - expected to be part of a platoon at third base and first base in 2012, possibly getting around 4 starts per week. He had a down year in 2011, which was a bit unexpected after his excellent 2010 season. He was a bit unlucky last year with a .249 BABIP, leading to a triple slash line of .223-.280-.346, but he owns a .290 BABIP, so he could bounce back to hit somewhere in the .270-.330-.450 area with 17-20 home runs in 2012
Allen Craig - Should push his value under 8 bucks in NL only leagues. Could easily surpass what he did in 2011 despite missing some time early to injury, good late round sleeper here. Will be counted on heavily and also in his prime.
David DeJesus - for the first time ever, he will hit in a park that is conducive to LHB success. And he wants to bounce back after a horrid year. Nice bounce back guy here even if he is a 2 cat producer, a warm body in a starting role or at least a major platoon starter would be effective.
Brandon Belt (1b/OF) - Belt played winter ball in the Dominican Republic in an effort to regain his stroke. He focused on shortening his swing and becoming quicker to the ball. He had an even 100 at-bats and hit .300, with three home runs and 11 RBI. His consistency improved and he looks ready to have a big year. In 2011, Belt hit only .225 with nine home runs and 18 RBI, in 187 at-bats. Belt can play first base and both corner outfield positions. I fully expect Belt to see somewhere closer to 300-350 at-bats in 2012.
Alex Presley - Nate McLouth Jr, need I say any more - minus SOME of the ks.
Jason Borgeois - The Astros are rebuilding and we could see Borgeois playing some second base and outfield this season. He stole 31 bases in just 238 at bats last year. Can you imagine how many steal he would have if he got 500 at bats? He attempted a steal 52% of the time he made it to first base in 2011, so 50 stolen bases are a possibility this season.
Dexter Fowler - Dexter Fowler, COL-it was reported that Fowler had increased his strength this offseason working out with Jason Giambi and Troy Tulowitzki, so there is optimism heading into spring training. Fowler had an excellent second half last season, where he hit .288-.381-.498 with 5 HRs, 10 triples and 22 doubles in 271 at bats. He chipped in with 10 stolen bases in 13 attempts, and I think he can steal 30+ bases in 2012 and hit .275-.280. If he can improve his BA vs right handed pitchers, he could have a breakout season in 2012.
Chris Heisey - . He has 20-20 potential, as he hit 18 HRs in 279 at bats last year. Heisey could also steal some at bats from strikeout king Drew Stubbs in center field as well. Heisey strikes out a bit too much-25%-but his .233 ISO is too much to pass up.
Jordan Schafer - good late round target here - Schafer isn't afraid to run as shown by his 22 steals between Atlanta and Houston last season in only 330 plate appearances. He plays a great CF so he has a shot at winning the starting job on his defense alone. If he does, he could easily rack up 30+ steals. If you find you need help in this category during the draft, he could be a nice pick after round 15.
John Mayberry Jr (1b/OF) - John was a solid, unheralded contributor to the Phillies 2011 campaign when he hit 0.273 with 15 homers and 8 steals coming off the bench. He is due for a boost in playing time in 2012 with Ibanez gone and Ryan Howard starting the season on the DL. He could start the season hitting 5th in the potent Phillies lineup and could be the sleeper pick of this draft if he if falls to the later rounds.
Lucas Duda (1b/OF) - Well the Mets need him to be a middle of the order bat and he will be. He can easily put up 280/25/85 and have 2 positions eligible. If you like the Lance Berkmans, Eric Hinskes, Michael Cuddyer's of the league, yes this makes a good mid to late round value.
Kyle Blanks (1b/OF) - Capable of 25+ homers if given enough ABs.
Michael Martinez - Though not expected to be a big contributor this year, utility player Michael Martinez has seen regular playing time at third base for the Philadelphia Phillies ever since Placido Polanco started missing time in early July. Polanco was scheduled to come off of the disabled list on July 20th, but his ailing back is not healing as quickly as he or the team expected, delaying his activation. Martinez will continue to see everyday at-bats until Polanco comes off of the DL, making him a viable option for any NL-only owner with a roster hole. His multi-position eligibility and a recent increase in stolen bases makes him a very valuable fantasy commodity, even though his other offensive stats are not as impressive as possible waiver wire alternatives. So look here as the Phillies get older you'll need a sub!
Mark DeRosa - Yes wrist injuries have killed him but he'll play all over and capable of producing a solid BA and double digit homers so nice late round sleeper here. Reach yes, risky yes, but NL only come on....
Josh Rodriguez - good backup for all the infield positions if he makes the bench he'd have an inside line on the SS position, who knows. Better than nothing I guess.
Drew Sutton - not much upside here, but he has shown the ability to hit for some power and not drain your BA good backup UTL bat if he makes the Braves out of ST, but with Andrelton Simmons looking so good he might be up the creek without a life saver.
Tyler Clippard - The Nationals should be better this year with the return of phenom Stephen Strasburg and the addition of Gio Gonzalez to the starting rotation. Tyler is only the set-up man, but he is a sneaky source of strikeouts, he has had over 100 in each of the past two seasons. He will also help your WHIP (he posted a 0.84 figure in 2011). My only concern with him is his heavy workload. Hopefully, his arm can withstand another season of 100 innings out of the bullpen before falling off.
Evan Meek - good late roudn target here, he only has Hanranhan blocking him from closing. One injury or shaky stretch and boom instant low end #1 closer for you.
Zach Braddock - If Axford proves to be a fluke, then Braddock would make a nice sleeper target, yes you have have F-Rod in the way but who knows he could get traded...
Joe Thatcher - here is a guy that is completely underrated and under the radar, if any injuries or poor performacne should befall Gregerson/Street, then Thatcher would be a nice closer for you.