GREEN BAY, Wis. -- B.J. Raji seems to think the arm injury he sustained in Friday's preseason game against the Oakland Raiders is not serious.

At least that's what he conveyed to Green Bay Packers coach Mike McCarthy.

"He's pretty confident about it," McCarthy said after the Packers’ 31-21 victory.

But even McCarthy did not sound sure.

Raji is scheduled to undergo more tests on Saturday.

"That's why you do the tests," McCarthy said. "We'll see what the tests say tomorrow."

Raji played parts of the first two defensive series and then did not return. The nose tackle's last play was a 1-yard run by Raiders running back Darren McFadden, and Raji did not appear to injury himself on that play. He was replaced by second-year pro Josh Boyd.

Raji remained on the sideline for the remainder of the first half and had a long, protective sleeve on his right arm, which he did not use during the game. He had ice on his upper arm after the game.

If Raji's injury is serious, the Packers could turn to Ryan Pickett, who played for the Packers from 2006 to 2013. He was not re-signed this offseason and remains unemployed. So does Johnny Jolly, who returned to the Packers last season after serving a three-year NFL suspension, but Jolly plays defensive end and not nose tackle.

The only other injury the Packers announced was to rookie cornerback Demetri Goodson, who sustained a concussion.