Lamar Odom's professional days on the hardwood might finally be over ... so says BIG3 coach Reggie Theus, who tells TMZ Sports he just doesn't think LO wants it badly enough.
"I just don't know if he's hungry enough if that's what he really wants to do," Theus says.
Odom just got the boot from the BIG3 earlier this month ... and our sources tell us it's because the 39-year-old just wasn't in shape to play.
When we got Reggie -- who coaches the league's Bivouac team -- out at LAX this week, he echoed those sentiments .