ALLEN PARK, Mich. — Detroit Lions left tackle Riley Reiff missed practice Tuesday, and all signs point to him not playing in Thursday’s game against the Chicago Bears.

Reiff suffered a left knee injury on the first play of Sunday’s loss to the New England Patriots and did not return.

On Tuesday, the Lions promoted offensive lineman Rodney Austin from the practice squad to the active roster, a move that gives them an extra backup if Reiff can’t play.

“He’s as tough as they come,” quarterback Matthew Stafford said of Reiff. “He filled in for a guy that kind of showed him the ropes when it comes to that. Jeff Backus was a bell cow for a long time at left tackle, and Riley’s very similar in his personality and his approach to football and what is being hurt and what is not.

“I know that Riley is doing everything he can to get back on the field on Thursday. We’ll see if it happens.”

A first-round pick in 2012, Reiff started every game the past two years since Backus retired. Backus missed just one start in 12 seasons with the Lions.

Lions coach Jim Caldwell did not have an update on Reiff’s status before practice Tuesday. However, the good news is the Lions don’t expect Reiff’s injury to be long-term.

“He’s a tough guy,” Caldwell said. “He’s tough, he’s durable, he’s typically been able to battle through a lot. If you play that position, literally, there’s contact on every play and those guys get accustomed to being uncomfortable until the point where it gets to be something that’s out of his control.”

–Lions center Dominic Raiola said Tuesday he won’t be fined for his late-game antics in Sunday’s loss to the New England Patriots.

On the final drive after the Patriots scored an unnecessary touchdown to make it 34-9 with 1:57 remaining, Raiola tried to punch defensive tackle Zach Moore twice and dove at his knees after snapping the ball on the final kneel-down.

Caldwell said Monday the team wouldn’t punish Raiola, but the NFL reviewed his plays before deciding not to fine him.

“There’s no fine,” Raiola said. “It’s during the game. I don’t know about regrets, I don’t live life with regrets. I didn’t intentionally try to hurt anybody. I didn’t try to do anything out of the ordinary. I would’ve gotten a Fed Ex letter (fine) for that. So, just play the game. I didn’t make it a big deal, everybody else did.”