CHICAGO -- New Chicago Cubs starter Michael Soroka left his first game with his new team with right shoulder discomfort and will require a stint on the injured list, the team announced on Monday after its 3-2 loss to the Cincinnati Reds .

Soroka, who turned 28 on Monday, felt something grab in his shoulder after throwing a pitch in the second inning. He didn't come out for the third.

"Went to go put a little extra on a fastball and it grabbed me a little bit," Soroka said afterwards. "And it didn't go away."

Soroka was acquired last week from the Washington Nationals for two prospects and though he's experienced a dip in velocity over the last month, he claimed he wasn't in any pain as he took the mound for the first time as a Cub.

"There was no reason to believe there was anyt

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