Guyton exited Thursday's game against Tampa Bay due to a back injury and didn't return, Jane Slater of NFL Network reports.
Guyton was deemed questionable late in the fourth quarter, and he didn't end up re-entering the contest. It's not clear if he'd have been able to get back on the field if there was more time left on the clock when he departed. As such, it bears watching Dallas' injury reports next week to get more insight about Guyton's status for Week 6 against Green Bay.