I like your starting pitching a lot, even without an ace. Some good strikeout guys, and you figure Hernandez or Wolf can step in if Beckett goes down with an injury (as he's prone to do). Since pitching is where you're deep, I'd even think about using one of the guys as trade bait to shore up some of the holes in your offense. You mentioned the middle infield; I also think your outfield is only so-so for a ten team league.
For a sleeper SS/2B, check your waivers for Julio Lugo (a 20 steal guy who'll score a bunch of runs)--I'm in a 12 team league, and no one had picked him up.