METAIRIE, La. — Reggie Bush's left knee needs further examination before he'll be allowed back on the field for either of New Orleans' final two games.

Noted orthopedic surgeon Dr. James Andrews will look at images from Bush's latest MRI, and coach Sean Payton said yesterday the team expects to have the results by early next week.

Bush was hurt when he was pushed out of bounds in the first half of Thursday night's 27-24 loss in Chicago. He remained on the sideline, often wearing his helmet and standing up as if eager to keep playing, but Payton held him out after seeing him rush for no gain on the Saints' opening drive of the third quarter.

"I didn't want to play him because I could tell it was affecting him," Payton said. "Once I knew he had sprained it, I didn't want to risk ... injuring it more and putting a player in that wasn't as effective."

Payton also said he has advised offensive coordinator Doug Marrone to leave for his new job as Syracuse's new head coach immediately.

"We felt it was better that he move on to that position and be able to get his staff going, be able to get recruiting going," Payton said.

While Marrone helped design offensive game plans and coached the offensive line, Payton has been calling the plays and choosing offensive personnel during games, something Bush alluded to when asked why he was held out in Chicago.

"I just work here. I'm just an employee," Bush said after the game. "I don't call the shots. I definitely don't call the plays."

Bush was not present when the locker room at the Saints' suburban training center was opened to reporters yesterday, but Payton stuck by his decision to focus his play-calling on undrafted second-year running back Pierre Thomas, who accounted for 146 yards and two touchdowns on plays from scrimmage while also returning three kickoffs for 63 yards.

"We all just work here, right? So I don't pay much attention to those comments that we're able to capture after a tough game," Payton said. Bush has "got to have this thing looked at and evaluated and he's got to stay healthy. Those are the things he's got to do and we'll help him do that in any way, shape or form, but those are decisions I've got to make during the course of a game.

"In his absence, I think Pierre did a pretty good job. We probably moved the ball as effective as we had all night."

Bush had eight touchdowns, including three on punt returns, before tearing the meniscus in his left knee on Oct. 19. He then missed four games before returning to action late last month. Bush had a career-long 43-yard run and scored his ninth touchdown in a victory over Atlanta on Dec. 7, but could be seen favoring his left leg during the Chicago game, after which the team said he had a sprained left knee.

"Obviously, I'm rooting for all those guys. I want to play 'em. I want them to be successful and it's in my best interest that they have success," Payton said. "I just felt like (keeping Bush off the field) was the best decision and I think as we examine where he is right now, I was correct."