Ex-NFL wide receiver Derek Hagan is at war with his estranged wife -- claiming she's still spending money and BALLIN' at nightclubs like an "NFL wife" ... even though he's out of the league.
Hagan -- who played 8 seasons in the NFL for the Dolphins, Giants, Raiders & Titans -- says he and Tiffany LeBlanc broke up in 2013 after nearly 2 years of marriage ... and it ended VERY BADLY.
In new court docs obtained by TMZ Sports, Hagan claims she sold her ring and cleaned out their Oakland house when he wasn't around -- taking all of their stuff -- zoomed off in their Porsche and then hit their joint bank account ... taking $150k and leaving for Texas.
Derek's pissed ... claiming she still wants MORE in the form of spousal support -- despite the fact he hasn't played in the league since '14 and his NFL career is over.
Hagan -- who's currently a sales rep for a helmet company making $1,800 per month -- says his wife is making NO EFFORT to get a job and continues to spend money like a baller.
"[Tiffany] has chosen to remain unemployed, continue to live the life of an 'NFL wife' and spend the majority of her time socializing and attending nightclubs."
Instead of getting a check from him, Derek says Tiffany (a licensed esthetician) needs to get her ass a jobby job ... and points out in court docs that there are currently 124 opening for estheticians in Houston.
We reached out to LeBlanc for comment ... so far, no word back.