NFL's Martavis Bryant's Baby Mama Claims He's a Deadbeat, Owes $80k in Child Support

The mother of Martavis Bryant's 5-year-old daughter says the NFLer has been dodging child support payments for months ... and claims he owes her nearly $80k.

Bryant's baby mama -- Jasmin Keesley -- tells TMZ Sports the Oakland Raiders WR has only made court-ordered payments 6 times since a paternity test determined he was the father in 2015. She says she's begged Bryant to help for years ... and he's refused.

Jasmin claims Bryant -- currently in a 4-year, $2.6 mil contract -- has been successfully dodging payments because he keeps moving without reporting his new address to court officials.

"They literally have to find him, and it takes about 4 months each time," Jasmin says. She also claims the department of social services has sent two wage withholding forms to the Raiders with no success.