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Week 4 injury roundup: Cam Newton enters concussion protocol
0:50 | NFL
Week 4 injury roundup: Cam Newton enters concussion protocol

TAMPA, Fla. (AP) Denver quarterback Trevor Siemian has left the Broncos' game against the Tampa Bay Buccaneers with an injury to his left, non-throwing shoulder and his return is questionable.

Siemian, who has the reigning Super Bowl champions off to a 3-0 start, was injured in the second quarter with Denver leading 14-7. He was replaced by rookie Paxton Lynch, who led a field goal drive in the closing seconds of the half to put the Broncos up 17-7 at the half.

Siemian is 5 of 7 for 68 yards and one touchdown.

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AP NFL website: www.pro32.ap.org and http://twitter.com/AP-NFL

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