Thompson filled gap after Anderson injury

DENVER -- Injuries have dented the Denver Broncos' depth at running back this week, but coach John Fox said following the 21-16 victory over the Seattle Seahawks the team didn't feel the need to bring in another player just yet.

"We've got numbers there, kids who have been with us and done a good job," Fox said. "Just gives them more opportunity."

There will be more opportunity for the youngest part of the team's depth chart as starting running back Montee Ball had an appendectomy on Monday. He may miss the remainder of the Broncos' preseason games if the team doesn't think he is ready to face the Houston Texans in a couple of weeks.

In Thursday night's win, C.J. Anderson, who had been working as the third back in the team's rotation thus far in training camp, suffered a concussion and will be evaluated under the league's concussion protocol. That means Anderson will miss, at minimum, some practice time this week.

According to the league's protocol, even if a player is symptom-free the following day, he can return only to light exercise on the second and third day following the concussion. He can participate only in the non-contact aspects of practice four days after the game when the injury was suffered.

Also per the policy, once a team doctor has signed off on a player's return to the field, a doctor unaffiliated with the team and approved by both the NFL and NFL Players Association must also clear the player to return. One of the factors considered, in addition to the cognitive tests, is a player's concussion history.

One of those "kids" Fox referred to is Juwan Thompson, who has worked in practice as the No. 4 back in the rotation. He led the Broncos in rushing Thursday night with 59 yards on his six carries, including a 20-yarder that set up a Broncos third-quarter touchdown. The undrafted rookie from Duke had consistently turned heads in camp with his pass protection skills, his ability as a receiver and -- at 225 pounds -- he is the biggest back on the roster.

"I'm not the shiftiest guy, but I can get out in open space and make someone miss here and there, but I do like to make people feel the pain," Thompson said. "Just to make sure, just don't try to tackle me the next time."

Thompson also played in David Cutcliffe's offense at Duke. Cutcliffe was Peyton Manning's offensive coordinator at Tennessee and since signing in Denver, Manning has taken the Broncos pass catchers to Duke to work out before the team begins its offseason program.

The Broncos' other two undrafted rookies at the position -- Kapri Bibbs and Brennan Clay -- finished with 18 and 2 yards rushing respectively.