DENVER -

Broncos running back Montee Ball returned to practice Tuesday, participating in individual drills in his first on-field workout since undergoing an appendectomy Aug. 4.

Ball sat out the team drills when the Broncos squared off against the Houston Texans.

Weakside linebacker Danny Trevathan made an appearance at practice, hobbling out on crutches.

Trevathan fractured his left leg in practice last week and is out four to six weeks.

Linebacker Lamin Barrow was back on the field 48 hours after dodging a serious knee injury in Denver's 34-0 win at San Francisco.

Tight end Gerell Robinson (ankle, knee) was also hurt in that game and was held out of practice along with cornerback Kayvon Webster (ankle), wide receiver Emmanuel Sanders (thigh) and tight end Virgil Green (calf).