ALAMEDA, Calif. -- Oakland Raiders rookie left guard Gabe Jackson practiced for a second straight day Thursday, but the team still isn’t sure whether he will start or play Sunday in St. Louis.

Jackson, Oakland’s third-round draft pick, has missed the previous three games with a knee injury suffered late in the fourth quarter against the Seattle Seahawks on Nov. 2. Jackson practiced one day last week, but was held out against the Chiefs and was excused from practice on Monday for personal reasons.

Although interim coach Tony Sparano is encouraged by Jackson’s progress, he might wait until Sunday to make a determination on Jackson’s availability.

"I saw some things yesterday during practice yesterday that were really good, I saw some things yesterday that weren’t quite where I think they needed to be," Sparano said. "We’ll watch the film today and see where he is. Whether or not he starts, plays or is not active, those are all still possibilities."

The rest of the Raiders injury report from Thursday:

Full: TE Brian Leonhardt (concussion)

Limited: RB Latavius Murray (concussion), S Larry Asante (shoulder), S Jonathan Dowling (back), CB TJ Carrie (ankle)

DNP: CB Carlos Rogers (knee), CB Neiko Thorpe (hand)