"I can't really measure the level of his concussion right now," coach Mike McCarthy said. "It's something that he'll go through the normal protocol. I was told that his head his clear and he has a headache. He was kind of groggy after those two plays he stayed in there, so that's when we had the decision to pull him."
Rodgers, who was not seen on the Packers' sideline after halftime, was not made available to reporters after the game.
The Packers took possession with 4:02 remaining in the first half of a scoreless game. On second-and-5 from the 27, Rodgers dropped back to pass and saw a big void in the Lions' defense and took off running. Rather than slide, Rodgers was hit by Landon Johnson and Amari Spievey at the end of an 18-yard run.
Rodgers was slow to get up and the Packers called a timeout. On the next play, it appeared Rodgers changed the play to a pass and was sacked by Andre Fluellen, who beat tight end Tom Crabtree. A running play by Brandon Jackson and a dump-off to Jackson resulted in fourth down and a Packers punt.
When the Packers took possession with 1:14 remaining, Matt Flynn entered at quarterback. Not long thereafter, it was announced that Rodgers was out with a concussion.
Rodgers finished 7-of-11 for 46 yards with no touchdowns, one interception and a passer rating of 34.7, ending a streak of four consecutive games with ratings topping 110. The interception came on what should have been a 73-yard touchdown pass late in the first quarter, but Greg Jennings dropped a perfect deep pass and it floated into the hands of Spievey.
Rodgers suffered a concussion during the Week 5 loss at Washington but never left the game. While there were concerns about his availability for the following week against Miami, Rodgers started. At this early stage, it's obviously too soon to know whether Rodgers will be under center for next Sunday night's critical game at powerhouse New England.
Rodgers' scrambling ability was the focus of a story at Packer Report on Monday. Rodgers ranked third among NFL quarterbacks in rushing with 284 yards entering the game. A lot of those yards didn't come on scrambles as much as the type of play in which Rodgers was hurt on Sunday, when he saw a huge expanse of green and tried to take advantage.
"I don't hold my breath (when Rodgers runs)," McCarthy said on Monday. "That's part of the way he is trained. That's part of the way he utilizes his athletic ability. I think he has been very smart with his scrambling."
Rodgers and McCarthy both referenced a play against Dallas this year, when Rodgers escaped and ran down the right sideline. Rather than get out of bounds, Rodgers was drilled.
"I kind of got rocked," Rodgers said on Wednesday. "I ran out to the right. I knew where the first down was. I had gotten the first down. But whoever was blocking Terence Newman kind of let him go at the last second and I just, I didn't really want to slide, I didn't have time to slide, I didn't have time to get out of bounds, I just kind of ducked my head and (the safety hit me on the side of the head and I kind of somehow spun around out of it, didn't really know where I was for a second because I kind of closed my eyes, and I was still in bounds and somebody pushed me out of bounds. Definitely a fun play. But something that I was chastised not to do again."
But something he did do, costing him and his team dearly on Sunday and potentially against next week.
On the first play of the second half, Flynn hit Andrew Quarless for a 20-yard gain, with Johnson being carted off the field. He suffered a neck injury but had movement in his extremities, it was announced.
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Bill Huber is publisher of Packer Report magazine and PackerReport.com and has written for Packer Report since 1997. E-mail him at email@example.com, or leave him a question in Packer Report's subscribers-only Packers Pro Club forum. Find Bill on Twitter at twitter.com/packerreport and Facebook under Bill Huber.