Mears was promoted from the alternate training site prior to Thursday's doubleheader against the Cardinals, Alex Stumpf of reports.

He has a 5.40 ERA, 2.70 WHIP and more walks (seven) than strikeouts (four) in 3.1 innings in the majors this year. While almost all the Pirates' high-leverage arms are injured, Mears still seems like a long shot to get late-inning work in close games.

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