The Mariners acquired Cummings from the Rays on Friday in exchange for Casey Legumina, Marc Topkin of the Tampa Bay Times reports.
Cummings was a seventh-round pick by Seattle in 2023 and was sent to Tampa Bay as part of the Randy Arozarena trade in 2024. Cummings pitched at three different levels of the minors last season, logging a 3.29 ERA and 6.7 K/9 across 123 innings.