Broncos QB Trevor Siemian carted off the field after being thrown to ground

The Denver Broncos have gotten off to a surprising 3-0 start thanks in part to the steady play of Trevor Siemian.

But the defending Super Bowl champs got a scare Sunday, when Siemian needed to be carted off the field after being thrown down to the turf by Bucs defensive tackle Clinton McDonald in the second quarter.

Trevor Siemian is being carted off to the locker room in Tampa. pic.twitter.com/CoD1aHUXAl
— NFLonCBS (@NFLonCBS) October 2, 2016

Siemian was taken to the locker room for observation and is questionable to return with a left shoulder injury.

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Denver's first-round pick Paxton Lynch came in to relieve Siemian, who returned to the sideline in a baseball cap at the start of the second half.