If you wanna be a Hall of Famer, you gotta LIVE like a Hall of Famer ... and for Dallas Stars phenom Tyler Seguin, that means BUYING an NHL Hall of Famer's mansion!
TMZ Sports has learned ... the 22-year-old rising star just bought a huge new place in Dallas ... and the guy he bought it from is Stars legend Mike Modano!
We've learned ... Modano originally listed the place for $2.295 million ... but ultimately sold the pad for $1.925 million ... giving a $370k discount to the new face of the franchise.
The place is sick ... 7,250 square feet with a full gym, outdoor fire pit, game room with wet bar and a humidor closet ... plus, there's a putting green!
Unfortunately for Tyler, if the Stars don't get their act together against the Ducks in the playoffs ... he could be spending more time at the pad this year than he probably wanted to.