The Dallas Cowboys announced today that tackle Josh Brent has retired from the NFL. The team put the defensive tackle on the reserved/retired list today. Brent had a promising career as an inside run-stuffer who occasionally showed burst through the middle of the line when the Cowboys played a 3-4 defense. His stint at nose tackle in place of Jay Ratliff was on an upward trajectory until a night in December of 2012. Brent was the driver of a car that was involved in an accident that killed teammate Jerry Brown, Jr.

Brent was convicted on a manslaughter charge in that case for being intoxicated while driving the car, that eventually led him to spending five months in jail. The Cowboys gave Brent a second chance last season after the family of Jerry Brown, Jr. gave it their blessing, but he first had to sit out an NFL suspension. Once he got back to the field, he only played one game until a calf injury kept him out of action.

Today, Brent officially ended his comeback attempt with the Cowboys. In addition, the Cowboys made some roster moves.