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Michigan State QB Cook injured in first half against Maryland

Nov 14, 2015; East Lansing, MI, USA; Michigan State Spartans quarterback Connor Cook (18) carries the ball against the Maryland Terrapins during the first half at Spartan Stadium. Mandatory Credit: Mike Carter-USA TODAY Sports

Nov 14, 2015; East Lansing, MI, USA; Michigan State Spartans quarterback Connor Cook (18) carries the ball against the Maryland Terrapins during the first half at Spartan Stadium. Mandatory Credit: Mike Carter-USA TODAY Sports

Michigan State quarterback was six of 20 for 77 yards with an interception in the first half.

Mike Carter USA TODAY Sports

EAST LANSING, Mich. -- Michigan State quarterback Connor Cook has left Saturday's game against Maryland after appearing to injure his right shoulder in the first half.

Cook was knocked down as he threw a pass during the first quarter and looked to be in pain when he went to the sideline. He was able to return to the game shortly after that, and played the rest of the first half. When the third quarter began, Cook was on the sideline wearing a headset and backup Tyler O'Connor was in at quarterback.

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Cook was only 6 of 20 for 77 yards with an interception in the first half, and now the senior star's health is in question for next weekend's showdown at Ohio State.