Mattson was recalled Monday, Roch Kubatko of MASNSports.com reports.

Mattson hasn't pitched in an official minor-league contest since the 2019 campaign when he spent most of his time at Double-A Mobile. He cruised to a 2.68 ERA and 1.00 WHIP with a 61:13 K:BB over 43.2 frames while with the Bears.

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