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Miley signed with the Milwaukee Brewers in 2018 and worked under pitching coach Derek Johnson, who’s entering his second season with the Reds in 2020, and then moved to the Astros last season. He’s 85-82 in nine seasons with a 4.32 ERA.
Miley is the Reds' second big free-agent signing this month. They signed free-agent infielder Mike Moustakas to a four-year, $64 million contract on Dec. 2.