Former NFL bad ass Chris McAlister -- who signed a $55 MILLION contract in 2004 -- claims he's BROKE AS A JOKE and living with his parents ... this according to court docs obtained by TMZ.
The ex-Baltimore Ravens defensive superstar has just filed new documents in his child support war with his ex-wife Marlene in the hopes of lowering his $11,000 per month obligation.
In the docs, Chris -- a 1st round NFL draft pick in 1999 who played in the league for 10 years -- states, "I have been unemployed since 2009. I have no income."
He adds, "I live in my parent's home. My parents provide me with my basic living expenses as I do not have the funds to do so."
McAlister was a KEY member of the Ravens when they won the Super Bowl in 2000 ... and even got himself an interception during the big game.
McAlister was only married to Marlene for 13 months -- but she claims Chris ended the relationship in 2009 when she got pregnant and refused to get an abortion.