Is Kate Hittin' It With A-Rod?

He's been rumored to have hooked up with everyone from the Material Mom to a Real Housewife, but now, the NY Post is claiming A-Rod is scoring with Kate Hudson!

In addition to catching the slugger's game last Friday at Yankee stadium, the pair apparently had a private after-party at Mustang Grill!

A bartender was reportedly "asking patrons not to go in the back room around 1 a.m. because A-Rod and Kate Hudson were back there making out." A waitress at the joint confirmed that they were there together, but didn't confirm whether or not A-Rod even made it to first base.

Additionally, Kate was spotted outside A-Rod's Central Park West apartment (you know, the one he got to be closer to Madonna?) over the weekend before heading back to LA.

It wouldn't be the first time these two hooked up -- earlier this year they were also spotted canoodling at NY's Rose Bar.

Maybe A-Rod is just Kate's NY location-ship?