The San Francisco Giants have found a trade partner for left-handed reliever Reiver Sanmartin, sending the veteran pitcher to the Washington Nationals in exchange for minor-league right-hander Robert Cranz.

The transaction was announced Friday after San Francisco designated Sanmartin for assignment earlier in the week. The move gives the Giants another opportunity to add pitching depth to their farm system while Washington acquires a left-handed option for its bullpen heading into the 2027 season.

Sanmartin, 30, appeared in 21 games with San Francisco during the 2026 campaign, recording a 4.22 ERA across 21.1 innings. He allowed opposing hitters to reach base consistently but demonstrated an ability to generate ground-ball outs.

The left-hander previously spent four seasons with the Cincinnati Reds before joining the Giants. Across five major league seasons, he has accumulated 105.2 innings with a 5.37 ERA.

Washington will be Sanmartin's third major-league organization. The Nationals are bringing in a pitcher with experience in multiple bullpen roles and a track record of getting hitters to put the ball on the ground.

Sanmartin primarily relies on his sinker, which averaged approximately 92 mph during the 2026 season. He also incorporates a slider and changeup into his repertoire, giving him multiple options against hitters from both sides of the plate.

His experience extends beyond the major leagues. Sanmartin spent parts of 10 seasons in the minor leagues, recording a 3.40 ERA across 564.1 innings. He has also demonstrated the ability to handle substantial workloads at Triple-A.

One important consideration for Washington is Sanmartin's roster status. He is out of minor-league options, meaning the Nationals cannot simply send him to the minors without first exposing him to waivers. He will need to earn a spot on the major-league roster or potentially face another designation for assignment.

In return, San Francisco receives Cranz, a 23-year-old right-hander originally selected by Washington in the seventh round of the 2024 MLB Draft out of Oklahoma State.

Cranz has produced encouraging results throughout much of his professional career, although his first exposure to Triple-A presented some challenges.

The right-hander struggled after receiving his promotion late in the 2026 season, surrendering 17 earned runs in just 11.2 innings. However, his earlier minor-league performances provide a more encouraging picture of his development.

Cranz recorded a 2.02 ERA across two Class-A levels in 2025 before moving through High-A and Double-A during the following season. He also showed an ability to generate strikeouts, although improving his control remains an important part of his development.

His repertoire includes a fastball that sits around 95 mph, a cutter and slider, along with an occasional changeup.