The Red Sox traded hard-throwing righty Luis Guerrero to the Rays on Tuesday for 29-year-old infielder Tristan Gray.

Boston also designated first baseman Nathaniel Lowe for assignment to make room on the 40-man roster for Gray. Those moves have been announced. More roster moves are coming before Tuesday’s 6 p.m. deadline to protect eligible minor leaguers from next month’s Rule 5 draft. The Red Sox are expected to — at least — add right-handed pitching prospect David Sandlin to the 40-man roster and potentially more prospects. In addition to Lowe, righty Josh Winckowski will be designated for assignment, sources confirmed.

Gray, a 29-year-old left-handed hitter, appeared in 30 games for the Rays in 2025. He batted .231 with a .282 on-base percentage, .410 slugging percentage and .693

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