Scott Tolzien replaces injured Seneca Wallace for Green Bay Packers

With Aaron Rodgers injured, Seneca Wallace was making his first start since 2011. (Gregory Shamus/Getty Images) The drop-off for the Packers from an injured

With Aaron Rodgers injured, Seneca Wallace was making his first start since 2011. (Gregory Shamus/Getty Images)

The drop-off for the Packers from an injured Aaron Rodgers to backup Seneca Wallace was enough to cause major concern in Green Bay. The dip from Wallace to untested third-year QB Scott Tolzien might be enough to force Green Bay to sign a quarterback in the coming days.

Wallace, making his first start since 2011 with Rodgers sidelined by a fractured collarbone, injured his groin in the first quarter Sunday. The setback appeared to occur on a third-down play, in which Wallace scrambled to his right before throwing an incompletion. As Wallace finished that pass attempt, Philadelphia's Najee Goode clipped his knee, causing Wallace to hop awkwardly before heading to the sideline.

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Tolzien replaced him for the next Green Bay possession. The University of Wisconsin product had not thrown a regular-season pass in the NFL prior to Sunday. He spent the 2011 and '12 seasons with San Francisco before joining the Packers' practice squad. Green Bay promoted him to the active roster with Rodgers out.

The Packers also have no third option, should anything befall Tolzien. Their usual emergency QB would be receiver Randall Cobb, who's also out with an injury. Fullback John Kuhn would have been pressed into duty if Tolzien had been forced from the lineup.

Packers GM Ted Thompson admitted to USA Today this week that the franchise does not even broach the subject of a Rodgers injury when prepping the roster.

"You make sure you have so many of every position, given the limitations of a 53-man roster. But quite frankly, you never think about your better players ever getting hurt. If you think that way, you might jinx it. It might happen. Literally, you don't think about it. It's a place where you never tread," Thompson said. "If something went wrong at the backup quarterback position, it's my fault."