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Some close to Indians ace Corey Kluber believe his early-season struggles were related to missing Yan Gomes, who is on the shelf with a with a sprained MCL, CBSSports.com Jon Heyman reports.

However, Kluber didn't seem to have any issues on Wednesday when he put together one of the best pitching performances of the season, striking out 18 -- the most in a game since Ben Sheets in 2004 and the most by an American League pitcher since Roger Clemens in 1998. 

Kluber is 1-5 with a 4.27 ERA over 52 2/3 innings pitched.

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