ENGLEWOOD, Colo. — Rookie quarterback Tim Tebow's first foray into an NFL end zone appears to have left him with injured ribs.

Denver's rookie quarterback missed his first practice of training camp Wednesday after jogging off the field during warm-ups. While the Broncos aren't saying what's wrong with their first-round draft pick from Florida, Tebow might be feeling the effects of his game-ending 7-yard touchdown run in his pro debut Sunday night.

Wearing flak jacket-like extra passing around his ribs this week, Tebow participated in both workouts Tuesday when the Broncos reconvened, but he skipped the post-practice wind sprints.

About 10 minutes into warm-ups Wednesday, Tebow huddled with head athletic trainer Steve Antonopulos and appeared to be favoring his left rib cage or abdomen as he jogged off the field and into the team's headquarters.