SANTA CLARA – Running back Reggie Bush is expected to miss some action after leaving the 49ers’ season opener on Monday night with a calf strain.
Afterward, Bush wrote on Twitter, “Great team win tonight. . . can’t wait to get healthy and back on the field.”
Coach Jim Tomsula said he did not believe Bush’s injury will keep him sidelined for an extended period of time.
"We don’t think it’s serious, but again we’ll take care of that," Tomsula said.
Still, with the 49ers coming up on a short week with a game Sunday against the Pittsburgh Steelers, it seems unlikely Bush will be available.
The 49ers’ running game was clicking on Monday in the 20-3 victory over the Minnesota Vikings. Carlos Hyde rushed for 168 yards and two touchdowns on 26 carries. The 49ers gained 230 yards on the ground.
Backup running back Jarryd Hayne muffed his only official punt attempt, resulting in the 49ers’ only turnover. And with Bush out of action, Hayne had to play more on offense than the team had originally planned. Hayne gained 13 yards on four carries. He also caught one pass for 7 yards.
"Yeah, I was disappointed with that first drop," Hayne said. "Other than that, I felt it was smooth. Definitely the man of the night was Carlos Hyde, running the rock. It was great to learn from him."
Rookie Mike Davis, a fourth-round draft pick from South Carolina, is likely to be in uniform against the Steelers. Davis was declared one of the 49ers’ seven inactive players.
---Kenneth Acker made his NFL debut and his first NFL start on Monday. He finished with four tackles. “It felt comfortable,” Acker said. “Everybody is out there communicating everything and a lot of the older guys were helping me out. So, I didn’t feel like I was out there by myself.”
---Rookie safety Jaquiski Tartt had a significant role in the 49ers' sub packages. Tartt finished with four tackles and a sack. “It’s like a dream come true," Tartt said. "I get to blitz, I get to play the tight end, I do whatever.”
---The 49ers recorded five sacks in the game, coming from five different players. Tartt, NaVorro Bowman, Antoine Bethea, Tank Carradine and Aaron Lynch each recorded sacks of Vikings quarterback Teddy Bridgewater. Defensive coordinator Eric Mangini had the Vikings on their heels.
"He dialed it up today," 49ers nose tackle Ian Williams said. "He was hitting on all of his calls and we were able to go out there and execute like he wanted.”