Borucki was called up as expected Tuesday and will make his major-league debut against the Astros.

Borucki could hardly have asked for a tougher opponent in his first career outing. The 24-year-old has a solid 3.27 ERA in 13 starts for Triple-A Buffalo this season, though his 18.4 percent strikeout rate is mediocre at best. Borucki projects as a back-end starter, with fringe command and a plus changeup backing up an average fastball. Gio Urshela was designated for assignment in a corresponding move.

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