Right-hander Gregory Santos is headed back to the open market after turning down an outright assignment to Triple-A Sacramento, according to Susan Slusser of the San Francisco Chronicle. The Giants had already run Santos through waivers unclaimed earlier in the week, and he’ll now become a free agent.
Santos, who turns 27 in August, was back in the Giants organization this past offseason on a minor league deal after making his 2021 big league debut with San Francisco. The club selected his contract in late April, and he got into five major league innings, giving up two runs on five hits and three walks while striking out one.
The Triple-A stint was rougher. In 15 2/3 innings with Sacramento, Santos allowed 12 runs for a 6.89 ERA, along with 17 hits and 11 walks against 11 strikeouts. He also missed roughly a month with an adductor strain.
Even with all the stops and starts, Santos has now logged parts of six major league seasons, including three with the Giants. His pro path began when Boston signed him out of the Dominican Republic, and he later came to San Francisco in the 2017 Eduardo Nunez trade. Since then, he has also been dealt to the White Sox for cash and moved from Chicago to Seattle in a trade that brought back Zach DeLoach, Prelander Berroa and a Competitive Balance draft pick.
There’s real upside in the arm, and Santos has already shown it. His best season came in 2023 with Chicago, when he threw a career-high 66 1/3 innings and posted a 3.39 ERA with six holds, five saves, a 22.8% strikeout rate, a 5.9% walk rate and a 52.5% ground-ball rate. The rebuilding White Sox then sent him to Seattle, which paid a pick and two minor leaguers in hopes of landing a bullpen piece it could keep under control for five more seasons.
That plan unraveled quickly because of injuries. Santos opened spring training 2024 with a lat strain that kept him out until July.
After returning, he worked just 5 1/3 innings before a biceps injury sent him back to the injured list for another eight weeks. His 2025 season began with reduced velocity, and by late April he was having surgery to repair cartilage in his right knee.
He never got back to a big league mound, and Seattle non-tendered him in November.
The talent is still there, but so is the long injury history. Santos made his professional debut in Boston’s Dominican Summer League in 2016 and has totaled only 347 1/3 professional innings, in part because of the canceled 2020 minor league season and in part because he has never reached even 50 innings in a pro season outside that 2023 breakout.
If he’s healthy, he should draw another minor league opportunity somewhere, and perhaps even return to the Giants. Francys Romero of BeisbolFR.com reported that several clubs have already contacted Santos with interest.
If he makes it back to the majors, he’d be optionable through the rest of the 2026 season and under team control for three more years via arbitration.
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