Up until this April, we haven't really seen much of this version of A-Rod with the Yankees (except for the 2005 season). The truly dialed-in hitter that puts up insane stats. But there's a reason for this. A-Rod seems adverse to playing at his peak on a winning team. With the exception of his 2005 and 2000 campaigns, he only seems to be capable of putting up crazy numbers when the team he's on stinks.
If you don't believe me, check out his stats on Baseball Reference. His best years, with the exception of 2005 and 2000, have all come on fairly mediocre to horrible teams.
Almost to help drive this point home, A-Rod has exploded offensively this month while the Yanks have been falling into the toilet and are now 4th in the AL East after they lost to the Devil Rays Monday night (a game in which A-Rod hit 2 home runs).
Is it sheer coincidence? Maybe, maybe not.