1. Corey Hart, OF, Milwaukee Brewers
Hart broke out last season, hitting .295, with 24 home runs, and stealing 23 bases. I don't see any reason why he can't replicate those numbers this season.
Despite the fact he contributes to all five categories, he flies under the radar as a Brewer not named Ryan Braun.
2. Billy Butler, UTL, Kansas City Royals
This guy has always been one of my favorite prospects, check out his AA numbers and age last season. He more than held his own as a 20-year-old in the majors, hitting .292 with eight homeruns in only 329 AB's. I expect him to replicate the BA and hit 20 or so home runs this year.
The perceived lack of power in his debut and lack of positional eligibility have dampened some of the excitement. But I’d be surprised if Butler doesn't add 1B eligibility at some point during the season (Ryan Shealy and Ross Gload aren’t anything to write home about).
3. Ryan Zimmerman, 3B, Washington Nationals
I feel like I’m cheating on this one, Zimmerman's not really a sleeper, but I do think he's a great value.
The Nats are moving into their new stadium on Opening Day, and it's bound to treat hitters better than their old digs. Additionally, Zimmerman's still young and should enjoy some natural progression.
I wouldn't be shocked to see .285 with low 30's HRs and 100+ RBI.