Bobby Humphrey, the Broncos' starting running back, is also questionable with two cracked ribs.

And Bobby Humphrey's fumble in the first quarter broke the game open for the 49ers.

Bobby Humphrey (1,151 rushing yards in '89) hopes Denver's new commitment to the running game was not a mirage last season.

Part of the reason is Bobby Humphrey, a rookie running back who has given the team a dimension it has lacked for years.

Green, playing in place of Bobby Humphrey, a contract holdout, had seven runs of 11 yards or more.

The Denver running back Bobby Humphrey, if his injured ribs hold up, is a solid threat.

Hill, subbing for the injured Bobby Humphrey, gained 86 yards in 14 carries.

Bobby Humphrey, the junior running back, gained 94 of those yards on 14 carries.

Bobby Humphrey, the league's leading rusher with 568 yards, is slowed by an ankle injury.

Their offense has improved with a newly found running game revolving around a rookie, Bobby Humphrey.

Bobby Humphrey, the Broncos' starting running back, is also questionable with two cracked ribs.

And Bobby Humphrey's fumble in the first quarter broke the game open for the 49ers.

Bobby Humphrey (1,151 rushing yards in '89) hopes Denver's new commitment to the running game was not a mirage last season.

Part of the reason is Bobby Humphrey, a rookie running back who has given the team a dimension it has lacked for years.

Green, playing in place of Bobby Humphrey, a contract holdout, had seven runs of 11 yards or more.

The Denver running back Bobby Humphrey, if his injured ribs hold up, is a solid threat.

Hill, subbing for the injured Bobby Humphrey, gained 86 yards in 14 carries.

Bobby Humphrey, the junior running back, gained 94 of those yards on 14 carries.

Bobby Humphrey, the league's leading rusher with 568 yards, is slowed by an ankle injury.

Their offense has improved with a newly found running game revolving around a rookie, Bobby Humphrey.