Rookie LT Menelik Watson misses practice

ALAMEDA, Calif. -- Raiders left tackle Menelik Watson's tweaked knee kept him out of practice Thursday, putting the rookie’s availability for Sunday’s season opener at Indianapolis in jeopardy.

As such, the Raiders have only two healthy offensive tackles on the roster in Khalif Barnes and Tony Pashos, who was signed Monday. And if Watson, who is just learning to protect the quarterback’s blind side, cannot go against the Colts, Barnes will slide from right tackle to the left and Pashos will start on the right side.

It all makes for an interesting development for purported starting quarterback Terrelle Pryor, who may have to rely on his legs even more than expected against the Colts.

“I don’t know how significant it is, I mean, obviously he injured himself yesterday in practice and wasn’t able to go in practice today,” said Raiders coach Dennis Allen. “We’ll find out more tomorrow as far as whether or not he’ll be able to go in the game. But it is what it is and we’ll know more tomorrow, probably.”

Allen said he would not get into roster specifics the Raiders “might” make if Watson is a no-go, but it’s obvious they would need another tackle.

“We probably would have to look at potentially bringing somebody up off the practice squad,” Allen said. “That’s a situation that we could consider.”

The lone offensive tackle on Oakland’s practice squad is Matt McCants.

The good news on the Raiders’ injury front? A day after sitting out practice, place-kicker Sebastian Janikowski (right calf) was limited but worked on the side during the open media window with new holder/punter Marquette King.

Quarterback Matt Flynn (right elbow) practiced full again, even as Allen remained steadfast in his desire to not publicly name a starting QB.

Tight end David Ausberry (shoulder) and left tackle Jared Veldheer (left triceps) did not practice.

Rookie strongside linebacker Sio Moore (foot) was added to the injury report as he was limited.