Why did the Red Sox demote Tanner Houck despite his success?

But the Sox also believe that Houck can benefit from time in the minors, just as his time at the alternate site last summer allowed him to make a sizable leap with his four-seam fastball command, playing a significant role in his big league success. He’s obviously performed very, very well. There’s no doubt about that,” said Sox pitching coach Dave Bush.

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