Leyer was added to the Red Sox's 60-man player pool.
Leyer, who is not on the 40-man roster, is a former starter turned reliever. He joined Boston last June after he was released by Seattle and was re-signed during the offseason. For the Red Sox in 2019, the 27-year-old native of the Dominican Republic pitched primarily at Double-A Portland where he had a 2.66 ERA with 30 strikeouts over 23.2 innings but also walked 17 (6.6 BB/9). Leyer has a live fastball that sits in the mid-to-high 90s, but only projects as bullpen depth in the upper minors unless he ever achieves consistent control.