The Giants’ next step with Adrian Houser is not about whether he can take the ball. It’s about what kind of pitcher they want him to be in 2027.
Houser’s first season in San Francisco gave the club a little bit of everything. He opened the year in the rotation, spent time in the bullpen, worked back into the rotation again, and ultimately ended his season on the injured list. The results landed in that frustrating middle ground: good enough to keep around, uneven enough to leave questions hanging.
Over 109.1 innings with the Giants, Houser finished with a 4.02 ERA, 4.55 FIP, 1.30 WHIP, 6.2 K/9 and a 2.21 SO/W rate. Those numbers don’t scream disaster, but they also don’t tell the full story of how inconsistent the ride was. He was hit hard early, then found some relief in a different role, and later returned in a modified setup that seemed to help.
Through his first 14 starts, Houser posted a 5.73 ERA. Once he moved to the bullpen, things turned quickly; in his next eight appearances, he logged a 2.08 ERA.
After that, he effectively rejoined the rotation in a bulk role, with the Giants using an opener to soften the landing. That arrangement worked.
The bigger issue is how his stuff fits together. Houser has spent much of his career as a true kitchen-sink pitcher, and that style has become more common again in pitching development circles. Teams like having starters throw a wide mix because it can help stretch outings and keep a pitcher from leaning too heavily on one or two weapons.
But that only works when the lead pitches are carrying the load. In Houser’s case, the Giants are trying to make that balance work with a fastball-changeup foundation that is better than the rest of the package. San Francisco pushed his four-seamer usage up to 21.7 percent, pairing it with a sinker-changeup combination that brings more downward movement.
The problem is the rest of the menu. Houser also throws a curveball and a slider, but both pitches continue to get hit hard.
He uses them plenty against left-handed hitters, yet those are not strong offerings in opposite-handed matchups. That leaves him with a real weakness against lefties, and opponents made him pay for it by posting an .884 OPS in those matchups this past season.
So the Giants are left weighing three paths. They can keep the kitchen-sink approach and hope the extra variety helps him work deeper into games, even if the breaking balls remain shaky.
They can trim the pitch mix down and try to squeeze more effectiveness out of what he does best, knowing that may cost him innings because hitters see the same looks more often. Or they can add something new, with a cutter or splitter as the possible answer.
A cutter would not solve the left-handed problem, but it would at least give same-sided hitters another look. A splitter would also change the shape of the conversation. Either way, the Giants have to decide whether Houser is better suited to being as effective as possible in a smaller role, or whether they want to keep chasing a version of him that can give them more innings along with better results.
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