Jon Lester, LHP
He was a revelation last year, the ace of a staff that went to Game 7 of the ALCS. But he also threw more innings than he ever had, with 210 in the regular season and 26" in the postseason. The Sox could try to get him rest here and there, but they also think he can be a workhorse as their No. 2 starter. Working on a changeup that might be used in the regular season, Lester seems poised to continue on the path he started last season.