Over the last three years, Matt Cain (RHP, SF) has averaged 220 innings, an ERA just under 3.00 and 13 wins. At age 27, he's in his prime. Is it safe to assume another season like the last?

Neil Walker (2B, PIT) proved to a good power-average combination for a middle infielder during his 2010 rookie season, going .296-12-66 in 426 ABs. But the average fell last season, and it took another 170 ABs to manage the same HR output. Yet he did swipe nine bases. The question now is, can he put it all together?

Brandon Beachy (RHP, ATL) was more than just the latest talented young pitcher to surface in Atlanta over the past two decades. He became the rock in an otherwise fragile Braves starting rotation. But as with any rookie sensation, we're left to wonder if he can improve, sustain—or will he take a step back?

Those expecting big power numbers from Aaron Hill (2B, ARI) last year were sorely disappointed. The same player who connected for 36 HRs two seasons ago managed just eight homers in 520 ABs between Toronto and Arizona. Meanwhile, he stole as many bags as he did during the previous five years combined. His average has seen wild swings over the past few seasons, too.

After several false starts, is Cameron Maybin now here to stay?