MLB Star Andrew McCutchen -- GETS MARRIED ... After 'Ellen' Proposal

Pittsburgh Pirates superstar Andrew McCutchen is a MARRIED MAN ... one year after proposing to his girlfriend Maria Hanslovan on "Ellen" ... TMZ Sports has learned.

The two were married in a ceremony on November 22nd ... they reportedly picked the date because of Andrew's jersey number ... 22.

When he proposed, Andrew told Maria ... "I did this to show you that ... If I could tell the whole world how much I love you, I would do that."

Obviously, she said yes and this weekend ... they finally swapped "I dos."

And to prove it's official ... Maria already changed her last name on her Twitter account to McCutchen!!!

Congrats!!!