PETTIGREW IN CUFFS TMZSports.com
Former Detroit Lions tight end Brandon Pettigrew spent part of his Sunday morning in jail ... after he punched and broke a glass door during a spat with authorities inside a Texas convenience store.
TMZ Sports has learned ... the incident happened at around 2 AM at a 7-Eleven in Dallas -- when police say Pettigrew became aggressive during an argument inside the shop.
It's unclear exactly what kicked off the tiff -- but in surveillance video, you can see after Pettigrew and several people exchanged words, the former ex-NFLer threw a right hook at the front door, causing it to break.