What happened: Kevin O'Connell said Jordan Mason suffered a small thumb fracture and that the issue has already been fixed. Minnesota moved the running back to short-term injured reserve and added DeeJay Dallas to the roster, with Mason expected back quickly.

Why it matters: The move reshapes Minnesota's backfield depth for the near term and gives Dallas an immediate path onto the active roster. It is another early-season adjustment for the Vikings, who named Carson Wentz backup to Kyler Murray last week.

What to watch: Minnesota's next practice and game-status reports will show how quickly Dallas is folded into the rotation. O'Connell's next update will be the clearest signal on Mason's return track.