Rookie LT Watson tweaks knee in practice

Oakland Raiders rookie left tackle Menelik Watson tweaked a knee during practice Wednesday, coach Dennis Allen said, putting his availability for Sunday’s opener at Indianapolis in question.

“I don’t know the extent of it,” Allen said of Watson’s injury. “We’ll find that out later. So he was limited (in practice).”

Watson, the Raiders’ second-round draft choice, just made the move to protect the quarterback’s blind side in the wake of Jared Veldheer’s left triceps injury that required surgery. A right tackle by trade -- he has only played two years of organized football, one year at Florida State and one in junior college -- Watson is slated to start at left tackle.

But if Watson is unable to go against the Colts, Allen said the Raiders would slide right tackle Khalif Barnes to the left side and start recent signee Tony Pashos at right tackle.

Besides Veldheer, who is awaiting the team’s decision on whether to place him on either season-ending injured reserve or partial-season IR, two other Raiders did not practice: tight end David Ausberry (shoulder) and place-kicker Sebastian Janikowski (right calf).

Allen said, though, that the left-footed Janikowski would kick against the Colts.

“He’ll be fine, yeah,” Allen said.

The only other Raiders player on the initial injury report of the week was quarterback Matt Flynn (elbow), who practiced full.