First of all, ERA+ is a league stat, so the AL vs. NL argument doesn't apply. And yes, CC has been better the last three seasons, but he was only fully healthy last season. Last season he put up numbers as good as any year CC's had outside of his ridonkulous 2008. Sure, I'd obviously choose Sabathia over Sheets on a level playing field, but when you consider the contracts each will get, Sheets is at least as attractive as CC.