Among the youngsters, LHP Justus Sheffield, acquired by the Mariners in the 2018 James Paxton trade, is likely to open the 2020 campaign as a member of the rotation.
Sheffield owned a 5.50 ERA over the course of 36 IP. He struck out 37 while walking 18. Of course, those numbers don’t tell the full story. In the case of Sheffield, they hardly tell the story at all. He began the year in AAA Tacoma and, just like every other pitcher in AAA, got pummeled.
He did make one appearance in the big leagues, filling in as the headliner after Yusei Kikuchi pitched in one of his planned abbreviated starts.