KANSAS CITY, Mo. (AP) — Matt Cassel is getting another chance to be the Chiefs' starting quarterback.
Cassel will start Thursday night's game at San Diego because Brady Quinn has not been cleared to practice due to a concussion, regaining the starting job — at least for one week — that he lost after a dismal five-game stretch to start the season.
Chiefs coach Romeo Crennel announced Tuesday that Quinn will not be available, and that Ricky Stanzi will serve as the backup. Fullback Nate Eachus was also ruled out with a concussion.
"They will continue with their testing and evaluation and will return when the doctor releases them, and lets us know they're OK," said Crennel, adding that doctors haven't told him how long Quinn might be out.
Cassel was scuffling along until he sustained his own concussion a few weeks ago against Baltimore. Quinn took over for a loss to Tampa Bay, and Crennel made the move permanent during the bye week in hopes of igniting a struggling offense.
He never got much chance to see whether it worked.
Quinn was hurt in the first quarter of Sunday's 26-16 loss to the Oakland Raiders, though it's unclear when the injury occurred. He was sacked by Rolando McClain and then took another shot while floating a pass that was picked off by Matt Giordano.
Quinn left the field and went down the tunnel leading to the locker rooms, and Crennel said a trainer told him at that point that Quinn had sustained a "head injury" and was unavailable.
Cassel played the rest of way, completing 20 of 30 passes for 218 yards with a touchdown and an interception. It was the 10th pick that he's thrown in parts of six games this season.
"I'm excited to be playing," Cassel said. "As I said last week, my approach doesn't change. I'm going to go out (and) I'm going to work hard. It's unfortunate for Brady, but at the same time, we have to move forward. It's a short week. Preparation has to be put in."
Cassel, who signed a $63 million, six-year deal in 2009, said he doesn't harbor any ill will toward Crennel over his benching. Cassel also said he doesn't find it uncomfortable that he's regained the starting job on a temporary basis almost by default.
"I don't look at it that way," Cassel said. "No matter what my position is, I'm going to be the same guy, and I think that's the reason I was able to go in there and execute at a high level Sunday. I was ready and my approach was the same."