I say of late and you pick an arbitrary date 6 weeks ago. I say four and you pick the fifth guy. I see, nice logic. I thought you were smart?
Joba- last 3 starts- 3-0 21.2IP 1ER 16 baserunners 19K 0.41ERA 0.73WHIP
Pettitte- last 4 starts- 1-1 26.2IP 7ER 27 baserunners 29K 2.36ERA 1.10WHIP
Burnett- aside from his last start (which was the caveat I used in my post), he has been rolling since June 1- 7-2 63.1IP 16ER 82 baserunners 2.27ERA 1.30WHIP
Sabathia- he's been the worst of them. Last 4 games, 26.2IP 33H 13ER 5BB 19K for a 4.38ERA and a 1.42WHIP
Now, I made the caveat that the sox top 2 have been untouchable and they really skew the stats of the sox starters. Outside of Lester and Beckett, here are your starters of late...
Buchholz - last 4 starts 19.1IP 13ER 39 baserunners 6.05ERA 2.02WHIP
Smoltz- last 3 starts 16.2IP 17ER 27 baserunners 9.17ERA 1.62WHIP
Penny- last 4 starts 22.1IP 18ER 33 baserunners 7.27ERA 1.48WHIP
So yeah, I would consider the yankees top 4 rolling and the sox starters outside of Lester and Beckett scuffling. It isnt rocket science there captain