The Astros designated Pruitt for assignment Wednesday, Brian McTaggart of MLB.com reports.

Houston cut Pruitt to make room on the 40-man roster and 26-man active roster for reliever Rafael Montero, who was acquired along with Kendall Graveman from the Mariners on Tuesday. After missing the first three and a half months of the season while recovering from September surgery to repair a fractured elbow, Pruitt struggled to regain form upon being activated from the injured list. In his two appearances out of the Houston bullpen, Pruitt gave up a pair of runs on three hits, including two solo home runs.

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