Giants call up Kyle Harrison, designate Lou Trivino

The Giants announced that right-hander Lou Trivino has been designated for assignment.  In the corresponding move, southpaw Kyle Harrison has been called up to the Giants’ roster for the first time in 2025.  A 40-man roster spot has also been created with Trivino being DFA’ed, though no other transaction appears to be forthcoming to fill that spot.

Trivino threw a scoreless inning of relief in Sunday’ 9-3 win over the Rockies, though his ERA still sits at 5.84 over 12 1/3 frames this season, with below-average strikeout and walk rates.  The righty has been tagged for four home runs during his brief sample size of work, and it appears as though the Giants are ready to move on, or are at least comfortable in exposing Trivino to the waiver wire.

Some rust isn’t unusual given Trivino’s long layoff, as a Tommy John surgery and some other arm issues kept him from any MLB action at all during the 2023-24 seasons.  Trivino’s only on-field action in the previous two years was 11 minor league innings with the Yankees last year, and some late-season shoulder soreness erased any hope Trivino had of making a late-season return to the Show before 2024 was over.  He caught on with San Francisco on a minor league contract during the offseason, and getting selected to the active roster meant that Trivino locked in a $1.5MM guaranteed salary for the 2025 season.

Harrison’s last Triple-A start was on April 30, so he would be lined up to start in the majors as early as tomorrow, if San Francisco opts to remove Landen Roupp from the rotation.  Roupp has a 5.10 ERA over six starts and 30 innings this season, and he hasn’t looked sharp in either of his last two outings.  Jordan Hicks and his 6.03 ERA could also be a candidate to be moved to the bullpen, though Hicks just pitched on Saturday, making the timing slightly unusual if Harrison is indeed taking Hicks’ rotation spot.

The Giants might also be viewing Harrison as a bullpen candidate, to give the pen a long man and a second left-handed relief option behind Erik Miller.  Should Harrison indeed be used as a reliever, he’ll join Hayden Birdsong as a fellow starting candidate being utilized in a bullpen role.

Over 159 Major League innings during the 2023-24 seasons, Harrison has a 4.47 ERA, 22.5% strikeout rate, and 7.8% walk rate.  While not standout numbers, Harrison seemed set to have a rotation spot lined up heading into 2025, yet a shoulder impingement that cut his 2024 season short in September ended up lingering into the offseason, thus delaying his usual winter ramp-up work.  Between that disruption to Harrison’s routine and a virus that hit him hard during Spring Training, the decision was made to have Harrison begin the season in Triple-A in order to let him get fully ready.

As one of the more highly-touted starting prospects in baseball prior to his first call-up, Harrison is a key part of the Giants’ future, and a pitcher the team naturally hopes can be a long-term cornerstone.  That doesn’t necessarily mean Harrison will get another crack in the rotation immediately, but this call-up means that the Giants are eager to see how he further adjusts to take big league hitters.