NFL superstar Chris Johnson says he's not on the same page as Eugene Monroe -- telling TMZ Sports he does NOT support marijuana for pain treatment ... claiming, "I'm drug free."
The running back was out at Le Jardin in Hollywood last night -- when we asked about Monroe -- who implied he was just cut from the Baltimore Ravens over his pro-pot stance.
Johnson is pretty adamant he ain't with the green stuff -- but he IS with a pretty damn good rapper.
Check out the clip ... CJ's friend Ballie Ball takes over the clip and spits a verse -- and it's pretty good!