Jerez was tagged for 27 runs (26 earned) on 31 hits with a 23/13 K/BB ratio across 20 2/3 innings (19 appearances, one start) with Triple-A Tacoma this season. The 29-year-old southpaw last appeared in the big leagues with the Giants and Pirates back in 2019.

Jerez, 29, made 12 appearances with the Pirates and Giants back in 2019. He owns a 5.33 ERA, 1.82 WHIP and 24/17 K/BB ratio across 25 1/3 innings (29 appearances) at the major-league level since 2018. He'll serve as organizational relief depth for the Mariners.

Jerez's 4.34 ERA in 10.1 major-league innings for the Giants and Pirates last season looks decent enough, but it came with a 2.03 WHIP and a 9:9 K:BB. He doesn't look like much than an up-and-down reliever heading into his age-28 season.

The Pirates needed to clear some 40-man roster spots for players they wanted to protect from the Rule 5 draft, and Jerez is a casualty. He had a 4.35 ERA and 2.03 WHIP in 10.1 innings last year.