Madero was claimed off waivers by the Giants on Tuesday. Madero spent most of last season with Double-A Mobile, posting an unimpressive 5.72 ERA in 19 starts and one relief appearance. He did at least show good control, walking just 5.9 percent of opposing batters. Jake Jewell, claimed off waivers from the Angels just eight days prior, was designated for assignment in a corresponding move.
Madero was designated for assignment by the Angels on Tuesday. The 22-year-old reached Double-A Mobile for the first time last season but didn't exactly impress, posting a 5.72 ERA and a modest 18.3 percent strikeout rate. He did at least show good control, walking just 5.9 percent of opposing batters. He was removed from the 40-man roster to clear a space for Matt Andriese, acquired in a trade from Arizona in a corresponding move.
Madero was promoted to Double-A Mobile on Saturday, Fabian Ardaya of The Athletic reports. Madero was protected from the Rule 5 draft over the winter despite never pitching above High-A. After posting a 2.44 ERA in 44.1 innings at that level last season, he reached a new level this year, recording a 1.13 ERA over 16 frames while his strikeout rate jumped to 33.8 percent.
Madero was optioned to High-A Inland Empire on Sunday. Madero was traded from the Diamondbacks to the Angels in July 2017 and was added to the Angels' 40-man roster in November to protect him from the Rule 5 draft. The 21-year-old posted a 3.49 ERA, 1.30 WHIP and 95:27 K:BB over 105.2 innings between Low-A Burlington and Inland Empire last season. Madero showcased himself well by allowing one unearned run on eight hits across six innings at spring training.
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