Justin Blackmon DUI Arrest -- Wasted, Slurring, Angry ... Cops Say

Justin Blackmon admitted to having "2 drinks" at a local bar before getting behind the wheel of a 2015 Jeep Wrangler ... but appeared WASTED ... this according to the police report obtained by TMZ Sports.

The ex-NFL star was initially pulled over in Ardmore, OK on Saturday morning when cops spotted a defective brake light on his ride at 2:46 AM ... but when they approached the car, Blackmon reeked of booze.

According to the report, Blackmon had bloodshot watery eyes and he was slurring his speech -- and admitted to drinking at Chevy's Bar earlier that night.

Our sources tell us Blackmon goes to Chevy's a lot -- and is popular with the staff. One person tells us, "He's one of favorite people."

Cops say Blackmon bombed several field sobriety tests -- unable to walk in a straight line or balance himself.

Blackmon was eventually taken into custody on suspicion of DUI -- and cops say he became angry during the booking process ... refusing to give police his phone number.

According to the police report, Blackmon is listed at 6'2", 215 lbs.