At least SOME part of Mark McGwire belongs in the Hall of Fame ... so says Big Mac himself, who believes his 70th home run ball should be in Cooperstown STAT!!
"Bottom line," McGwire said out at LAX this week, "it should have been put in the Hall of Fame."
Of course, the ball can't exactly go there at the moment ... Todd McFarlane -- a legendary comic book artist -- famously bought it for over $3 MILLION just a few months after McGwire made history in 1998.
And, despite the ball's plummeting value (experts tell TMZ Sports it's worth only around $300K-$400K), McFarlane doesn't seem at all ready to part with it, even for the Hall.
In other words, don't bet on it ending up in the Hall, even if it'd take it.
As for Mark, he said he's at peace with the ball not being worth millions anymore, adding, "It dropped when Barry [Bonds] broke the record." But, the Cardinals legend did say he wouldn't mind autographing it!!
There's more ... McGwire went IN on the MLB's plan to allow a DH in the National League in 2020 -- saying he believes the role should be punted from baseball altogether.
"If you can't put on a glove and go out and play defense," McGwire said, "you shouldn't be playing the game!"