It’s official: Brian Waters‘ brief NFL comeback has come to an end.

Waters, the veteran guard who ended an 18-month hiatus to sign with Dallas and immediately shored up the Cowboys’ offensive line, has been placed on season-ending injured reserve. The Cowboys said a strained rib, a hyperextended knee and a torn triceps, all suffered in last week’s loss to Detroit, all contributed to the decision to end Waters’ season. The triceps injury is the most severe of the three.

A 13-year veteran, Waters has been a solid asset to offensive lines in Kansas City and New England and was playing well for the Cowboys, but after this injury he may be ready to call it a career.