A-Rod -- Surgery-Schmurgery ... I'll Be Back

Injured New York Yankees powerhouse Alex Rodriguez isn't letting a little thing like MAJOR surgery get him down ... telling TMZ, there's no doubt in his mind he'll be aces in no time.

A-Rod spoke to us in Beverly Hills yesterday ... and we asked him about his upcoming SECOND hip surgery -- scheduled for January -- which is expected to knock him out of the season well into 2013.

But A-Rod wasn't fazed one bit by his current condition ... telling our camera guy he "can't wait to be back."