OAKLAND -- The Raiders are going to be without strong safety Tyvon Branch for a while after he suffered what appears to be a serious injury to his right ankle Sunday in a 19-9 victory over the Jacksonville Jaguars.

"That looks to be a significant injury," Raiders coach Dennis Allen said. "We'll find out more later."

Branch, a starter since his second season in 2009, was injured on the Jaguars' second drive of the game. Team trainers had to help him off the field with 7:50 left in the first quarter as he was in obvious pain and unable to put much pressure on the ankle.

"That's tough," free safety Usama Young said. "He's a great player. I talked to him at the half. You never want to see one of your guys go down. I'm going to hit him up as soon as I get up out of here.

"Hopefully he's not too bad, but a player like that, it always hurts. He's been playing at a high level for a while and with that, somebody's got to step up."

Brandian Ross took over for Branch at strong safety, and he will be expected to carry the burden if Branch is out for an extended stretch. Young had 1½ sacks and Ross also had a sack Sunday.

  • Sebastian Janikowski missed a field-goal attempt from 35 yards out -- his second miss from 50 yards or less in two weeks after being perfect from that range last season. One of his 29-yard field goals barely went over the top of an upright, a near miss.

    Janikowski is adjusting to a new holder in Marquette King after playing from 2000 through 2012 with Shane Lechler as his holder.

  • The Raiders had five sacks of Chad Henne and have nine in two games after having 25 all of last season. Besides Young and Ross, defensive end Jason Hunter and defensive tackle Christo Bilukidi had sacks and cornerback Tracy Porter had a half-sack.

    "We try to be multiple and send several different guys in different directions, and I think our rush has continued to improve," Allen said.

  • In her new role as a CBS studio analyst, former Raiders executive Amy Trask made it clear she didn't think much of the Raiders' decision to trade for Matt Flynn rather than simply make Terrelle Pryor the No. 1 quarterback.

    "I have been a proponent for quite a long time of giving this young man an opportunity, to give him a chance," Trask said on the air. "When Dennis Allen made the decision to move on from Carson Palmer, I thought the obvious and the smart answer was to give Pryor a shot, see what he has."

    Trask said of Flynn, who was guaranteed $6.5 million this season:

    "He has a two-game resume, yet you gave up draft picks, which you've stated that you covet," Trask said. "You're giving up draft picks and a lot of money to bring in a guy with a two-game resume, when you've stated you're in a transitional mode."

  • Aaron Hern, the 12-year-old Martinez resident who sustained shrapnel injuries at the Boston Marathon bombing April 15, attended the game with his father, Alan, and mother, Katherine, and delivered the game ball to officials.

    Hern was on the field before the game and posed for pictures with Branch, Raiders owner Mark Davis and actor Carl Weathers.

    Staff writer Jerry McDonald contributed to this report.