ENGLEWOOD, Colo. (AP) -- The Denver Broncos are down to just two tailbacks and two fullbacks.

The Broncos lost their top two running backs to injuries in their loss at Dallas on Saturday night. Travis Henry sprained his left knee and will sit out the Broncos' last two preseason games, and his backup, Mike Bell, has a hip injury that will also sideline him until Denver's regular season opener.

Another running back, Andre Hall, is out with a pulled hamstring.

And starting fullback Kyle Johnson has a sore shoulder among other bumps and bruises, and didn't participate in Monday's workout.

That left just four men in the backfield: tailbacks Cecil Sapp and Selvin Young, and fullbacks Paul Smith and Troy Fleming.

Besides their running back woes, the Denver Broncos also are banged up along the lines. Guard Ben Hamilton, tackles Ryan Harris and Adam Meadows, and defensive linemen Tim Crowder and Demetrin Veal are all sidelined with injuries.

The Broncos lost starting defensive end Ebenezer Ekuban for the season to a torn Achilles' tendon.

Crowder could replace him when he gets healthy, or Kenard Lang might move into the starting lineup just like he did last season when Courtney Brown was lost for the season in training camp.