The Giants designated Black for assignment Thursday.
Black spent the majority of the 2025 campaign at Triple-A Sacramento, where he struggled to the tune of a 5.81 ERA and 1.48 WHIP alongside a 114:62 K:BB over 119.1 innings. His poor performance will now cause him to lose his place on San Francisco's 40-man roster in favor of Reiver Sanmartin, who was claimed off waivers from the Reds in a corresponding move.
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Giants' Justin Dean: Claimed by Giants
Rotowire
The Giants claimed Dean off waivers from the Dodgers on Thursday, Alex Pavlovic of NBC Sports Bay Area reports.
Dean logged two plate appearances in 18 big-league games during the 2025 regular season before serving as a defensive specialist for Los Angeles' World Series run. The outfielder spent most of the season at Triple-A Oklahoma City and slashed .289/.378/431 with six homers and 27 stolen bases over 347 plate appearances
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Giants' Reiver Sanmartin: Headed to San Francisco
Rotowire
The Giants claimed Sanmartin off waivers from the Reds on Thursday, Alex Pavlovic of NBC Sports Bay Area reports.
Sanmartin will get a fresh start out west after spending the last six seasons as part of the Reds organization. The left-hander, who turns 30 in April, appeared in one big-league game during the 2025 campaign. He tallied a 2.67 ERA, a 1.24 WHIP and a 55:18 K:BB across 67.1 innings for Triple-A Louisville.
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Giants' Logan Porter: Back with Giants as NRI
Rotowire
The Giants re-signed Porter to a minor-league contract with an invitation to spring training Friday, Bob Nightengale of USA Today reports.
Porter played five games with the Giants in 2025 and slashed .212/.346/.316 with six home runs over 73 contests at Triple-A Sacramento. He'll return to Sacramento to begin the 2026 season, giving San Francisco some experienced catching depth.
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