Brailford made the announcement on Twitter and noted that he will play in the Cowboys' bowl game.
The 6-foot-3, 250-pound Brailford was a first-team All-Big 12 selection this season, was second in the conference with nine sacks and was third in the league with 16 tackles for loss. ESPN draft analyst Mel Kiper Jr. ranks him ninth among defensive end prospects in the upcoming draft.
The Cowboys play Missouri in the AutoZone Liberty Bowl on Dec. 31 in Memphis (3:45 p.m. ET, ESPN).