Former college football star Justin Blackmon couldn't fit in the back of a cop car during his public intoxication arrest ... with a police report obtained by TMZ Sports stating a larger vehicle was required to transport him to jail.
The 35-year-old ex-Oklahoma State Cowboys receiver's most recent run-in with the law made rounds on social media over the weekend ... with sports fans noting the drastic change in Blackmon's appearance in his mug shot.
According to the incident report, OSU cops responded to a call regarding a "larger black male" laying on the ground at 1:32 AM on Saturday morning.