This comes a day after the team traded veteran QB Matt Cassel to the Cowboys for a future draft pick.
Vaughan, 24, originally signed on with the Cowboys as an undrafted free agent out of West Texas A&M in May of last year. He wound up making the 53-man roster coming out of the preseason, but was unfortunately among Dallas’ final roster cuts from a few weeks back.
Since then, Vaughn has worked out for the Patriots and Titans.
During his college career, Vaughan completed 593 of 949 passing (62.5) for 8,124 yards to go along with 70 touchdowns and 19 interceptions.