Mets legend Darryl Strawberry ain't bitter that Pete Alonso is crushing his rookie home run record ... in fact, the dude is fired up for NY's newest superstar!!!
"That's pretty cool, man," Strawberry tells TMZ Sports ... "I'm really happy for him."
Darryl hit 26 bombs as a rookie for the Mets in 1983 ... and no first-year Met had come close to catching that mark since -- until Alonso this season.
But, Pete hasn't just caught that number ... he's destroyed it -- the rookie has 40 home runs this season, only 12 away from the most in MLB history for a rook.