Former Mets left-handed reliever José Castillo, who was designated for assignment on Aug. 30, was claimed off waivers by the Seattle Mariners and added to their 40-man roster on Wednesday.
Castillo, 29, was acquired by New York from the Arizona Diamondbacks on May 15 in exchange for cash, and pitched in 16 games for the Mets.
He had a 2.35 ERA and 1.76 WHIP over 15.1 innings, tallying 19 strikeouts and six walks. The lefty last pitched in the bigs on Aug. 29 against the Miami Marlins, allowing one run on four hits over 2.0 innings.
Those appearances brought his season ERA down to 4.98 after he struggled with the D-backs, pitching to an 11.37 ERA over 6.1 innings in five games earlier this season.
Castillo also pitched in 10 games for Triple-A Syracuse while with New York, posting a 1.69 ERA and striking out 16 in 10.2 innings.
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