Myles Garrett is only a tryout away from becoming a two-sport athlete ... 'cause Ice Cube tells TMZ Sports he'd love to give the NFL star a shot at playing in the BIG3!!

The rap legend and three-on-three league co-founder got wind of what the Cleveland Browns defensive end said while watching his brother, Sean Williams , play for the Miami 305 in the BIG3 Championship last week ... when Rachel Nichols asked the 6'4", 272-pounder if he could see himself playing in the BIG3 too. Play video content

Garrett teased he'd love to test his talents ... and Cube is on board -- as long as he goes through the same process as everyone else.

"It ain't as easy as it looks, but of course ... I think he'll be a big body, great player," Cube said.

"We'd love to see him, man. Tell him to

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