NFL's Torrey Smith -- Slams, Stomps Dude ... At Pro Wrestling Show!

49ers WR Torrey Smith made his triumphant return to Maryland last night -- but not for the Ravens ... dude was cleaning house at a pro wrestling show!!

Torrey hit up the MCW event in Joppa, MD -- and got ringside to help out his friends Damien Sandow and Colt Cabana take on The Kings.

At one point, Smith got physical with manager Justin Schiegel -- with a shove slam to the ground ... followed up by some good ol' fashioned stomps.

He even let his 2-year-old son Torrey Jr. get in on the action -- it's pretty great.