Lenny Dykstra is a grandpa

Jamie-Lynn Sigler and Cutter Dykstra have welcomed a baby. (AP Photos)

Former Phillie Lenny Dykstra is a firsttime grandpa.

Dykstra's son, minor league baseball player Cutter Dykstra, and actress fiancee Jamie-Lynn Sigler welcomed a baby boy yesterday afternoon.Sigler, most famous for her role as Meadow Soprano on "The Sopranos," got engaged to Cutter in January and announced their pending baby joy in February.

"Both mommy and baby are great!" a rep told Us Weekly.

Dykstra recently caught his son, who plays for the Potomac Nationals, play against the Wilmington Blue Rocks. It was the first time Dykstra has seen Cutter play since his release from prison.