SANTA CLARA -- Reggie Bush "looks fine" after suffering a calf strain early in Monday's game, but will have more tests, including an MRI, today, Jim Tomsula said.
“They’re going to send him down (to Stanford Hospital) to get tests,” Tomsula said. “He looked good. He’s not running yet but he looks fine.”
Tomsula said it was too early to say whether Bush would be ready to play Sunday against the Steelers. However, he's taken a cautious approach toward injuries since he became the head coach with an emphasis on not allowing minor issues to become long-term problems.
On Monday he said he didn't want to allow Bush's injury, even if were only a four-day issue, to last six weeks.
Though he did not start, Bush looked as if he would be a major component of the offense before his injury in the first quarter. He was in four eight plays, had two carries and was targeted on a pass attempt.
When he went to the locker room, Carlos Hyde ended up playing 55 snaps -- including 26 rushing attempts -- which was far more than he had anticipated. With that in mind, look for rookie tailback Mike Davis, who was inactive Monday, to be in uniform against the Steelers if Bush doesn't play.
Jarryd Hayne's game-day status again will be a mystery. The 49ers don't want him to be their primary backup running back because he still is learning the position. But he could be needed as either the primary or backup punt returner because Bush also returns punts.
Tomsula said he wanted Hayne to learn from his muffed first-quarter but didn't want to take away the aggression that Hayne so special. "Very confident in his ability to field a punt," Tomsula said.