The Los Angeles Dodgers executed a trade, sending Joe Jacques to the Seattle Mariners and acquiring right-handed pitcher Will Klein. The Dodgers also made a roster adjustment, recalling Ryan Loutos and designating Chris Stratton for assignment. Stratton, a veteran pitcher, has had a tumultuous MLB career since his debut in 2016, including brief stints with several teams.

Klein, who struggled in the Mariners' Triple-A affiliate, comes with a career 11.05 ERA in the majors. The Dodgers are set to face the New York Mets, with a pitching matchup of Dustin May against Paul Blackburn.

The Seattle Mariners have made a notable roster move by promoting infielder Cole Young from Triple-A Tacoma ahead of their matchup with the Minnesota Twins. Young, a former No. 21 overall pick in the 2022 MLB draft, has demonstrated impressive performance in the Pacific Coast League, boasting a .277 batting average and an .853 OPS this season. His standout month of May saw him hit an impressive .366, punctuated by 10 doubles and five home runs.

In a corresponding move, the Mariners reinstated right-handed pitcher Bryce Miller from the injured list, who is set to start, while optioning infielder Leo Rivas and right-hander Casey Legumina back to Tacoma. Additionally, right-hander Will Klein has been designated for assignment. Young's promotion reflects the Mariners' commitment to integrating young talent into their roster as they continue to compete in the AL West.

Heading into the offseason, the Seattle Mariners are focusing on bolstering their bullpen, an area identified as a critical positional need. Despite expectations for improvement in 2024, the depth of the relievers remains a concern. The team is optimistic about Matt Brash’s recovery from Tommy John surgery, which is ahead of schedule and expected to see him return early in April. Gregory Santos is also anticipated to be fit after a challenging previous season filled with injuries.

Recently, the Mariners added Shintaro Fujinami to their roster and further strengthened their bullpen by acquiring right-handed reliever Will Klein from the Oakland Athletics in exchange for international slot money, effectively adding him to the 40-man roster. In a corresponding move, left-handed reliever Tyler Jay was designated for assignment. Klein, initially drafted by the Kansas City Royals, had a rocky MLB debut last season with a 6.35 ERA in five appearances, followed by a difficult stint with the Athletics where he posted a staggering 27.00 ERA over three games. While Klein's initial statistics are concerning, the Mariners are known for their capability to develop pitchers, suggesting they might extract better performance from him.