Posey has named the Giants’ first repair: the bullpen

Buster Posey’s Tuesday admission gave the Giants a clear starting point: he overestimated the internal bullpen options, and the bullpen comes before the rotation. That is a necessary correction after a 65-97 season. It also creates a standard for the choices that follow. San Francisco should pursue relievers who limit baserunners and miss bats, rather than treating ERA as a complete scouting report.

Sam Hentges shows why the distinction matters. His 3.19 ERA is attractive in isolation. His 1.64 WHIP is not.

Hentges allowed 35 hits and 25 walks in 36.2 innings while striking out 41. WHIP measures hits plus walks per inning; it does not count every way a runner can reach base. His four hit batters, along with runners who reach on errors, are outside that calculation.

Even with that limitation, the components point to an arm that created too much traffic for a tidy ERA to settle the argument.

The strikeouts make Hentges more complicated, not automatically more valuable. His 10.06 strikeouts per nine innings offer a genuine way out of trouble. His 6.14 walks per nine innings repeatedly create trouble in the first place.

Those traits can coexist: a pitcher can have the ability to erase a hitter and still make too many innings difficult to manage. Hentges inherited 32 runners, 11 of whom scored, adding context to the deployment question without proving that every such run was his fault.

Keaton Winn supplies the contrasting profile. His 3.35 ERA and 1.19 WHIP across 43 innings show considerably better traffic control: 34 hits and 17 walks, with three hit batters not included in WHIP. Winn’s 3.56 walks per nine innings are manageable beside Hentges’ rate.

He struck out 33, however, or 6.91 per nine. His 1.94 strikeout-to-walk ratio is solid but leaves less margin when contact arrives.

That comparison is not an argument to choose one and discard the other. It describes what the Giants should seek beyond their current internal options. Winn’s lower WHIP does not establish a particular late-inning role, just as Hentges’ strikeout rate does not prove he fits every important assignment.

A new reliever who combines Winn’s control with Hentges’ ability to finish plate appearances would address the tension in these numbers. The acquisition should reduce both the runners created and the balls put in play under pressure.

Caleb Kilian sharpens the case from another angle. He struck out 53 in 44.1 innings, a 10.76 strikeout rate, while walking 20. His 4.26 ERA and 1.33 WHIP are less tidy than Winn’s results, but his 2.65 strikeout-to-walk ratio is the strongest of the three.

Kilian’s season does not prove that strikeouts alone solve a bullpen: he allowed five home runs and 23 runs. It does show why the shopping list should include swing-and-miss capacity even when the surface ERA is not inviting.

San Francisco’s 16-29 record in one-run games gives the bullpen a legitimate place in the discussion, though it cannot carry the entire explanation. The Giants scored 669 runs and allowed 760. The burden of closing a tight game is partly shaped by what happened earlier: starters determine the position inherited by the bullpen, while a lineup that adds runs gives its relievers more breathing room.

Treating every narrow defeat as a relief failure would let too much of the roster off the hook.

Posey’s diagnosis becomes meaningful through the organization’s accountability for its actual choices. He has acknowledged that the internal answer was overestimated. The next test is whether San Francisco selects arms for the underlying job—controlling walks, limiting hits and producing strikeouts—rather than for an ERA that can hide the traffic underneath.

A bullpen-first priority is defensible. Its credibility will be measured by the relievers the Giants actually choose and how closely those choices match the problem Posey identified.

Sources

NBC Sports Bay Area: Giants season-end news conference

MLB: final 2026 statistics and standings

MLB: final 2026 statistics and standings