Matt Chapman Played Most Of This Season With A Hernia

Matt Chapman batted 224 times in April and May and did not hit a home run.

That number sat in the open all spring and nobody built a story on it, including this site. Chapman has hit at least 20 home runs in six of his seven full seasons. He hit 36 in one of them. Two months of nothing in the middle of a $151 million contract is the sort of thing that gets filed under a slump, or under turning 33, or under the way pitchers are attacking him now, and mostly it got filed under nothing at all, because the Giants were losing in louder ways.

On Friday it acquired a second possible reading.

Maria Guardado of MLB.com reported that Chapman is dealing with a hernia "that has hampered him throughout the year." Alex Pavlovic of NBC Sports Bay Area put it as a hernia Chapman has played through for the majority of the season. Susan Slusser of the San Francisco Chronicle reported a hernia and a core muscle tear. Three reporters, three phrasings, one claim underneath all of them: the injury that put Chapman on the injured list on July 1 was not new on July 1.

What Friday actually produced#

A second MRI earlier this week confirmed the core muscle injury. On Sunday Chapman flies to Philadelphia to see Dr. William Meyers, who specializes in these, and manager Tony Vitello was direct about where that is heading.

"He's going to go see an expert in that field and be sure about what needs to be done," Vitello said, per Guardado. "Surgery's probably more likely than not [going to happen]. But I think [it's] getting squared away with that doctor and [being] 100% about what's the best path. If that is the path, it would be the end of his season on the field."

Chapman told Pavlovic he is "pretty sure" the surgery happens Tuesday.

"It's nice to know (what's wrong)," Chapman said. "But it sucks because it probably means my season is over. I was looking forward to getting back out there and playing."

The setback that led here was specific. San Francisco had hoped to activate Chapman during last week's series in San Diego, and he kept feeling discomfort when he ran at game speed, which stopped the rehab and sent him back into the imaging.

The part that was legible all along#

Here is his season, month by month, from the league's own stats feed, pulled Saturday morning.

Monthly splits via the MLB Stats API, retrieved August 8, 2026. He went on the injured list July 1 and has not played since, so the season is four months long.

Fifty-three games, 224 plate appearances, no home runs. Then 26 games and six of them. Then July 1 and the injured list.

Now the paragraph this piece is built around. Nobody has said the hernia caused any of that, and this site cannot say it. Not one person with access to the medical file has drawn that line in public, and Chapman did not draw it either. A hernia carried through most of a season is compatible with the April and May outage. It is equally compatible with a 33-year-old having two bad months and then a very good one, which happens to hitters every year with nothing wrong with them at all. June is the problem for the tidy version: he hit six home runs and posted a .838 OPS in June while carrying the same injury he had carried in May, when he posted a .534.

What can be said is narrower and still worth saying. Chapman played most of a season with a hernia, that season was the worst of his career by OPS, and those two facts have been sitting next to each other in public since Friday evening. Anyone who tells you which one explains the other is guessing, and the guess is cheap, because if Tuesday goes the way Vitello expects there are no more at-bats this year to test it against.

What it costs, and who plays there now#

Chapman is signed through 2030 on the six-year, $151 million extension he agreed to in September 2024, which pays $25,166,666 a year and carries a full no-trade clause and no deferred money. He turns 34 next April. The deal runs out when he is 37.

Third base has been a committee since he left, and a wide one. In the 13 games San Francisco played between July 25 and August 7, four men started there: Christian Koss eight times, Osleivis Basabe three, Buddy Kennedy twice, and Casey Schmitt twice before Schmitt tore the meniscus in his left knee and went on the injured list himself on July 28. Schmitt has already had the operation, was cleared Friday to walk without crutches, and was given a six-to-eight-week timeline. Six weeks from Friday is September 18, which would leave him nine days of season to come back to, and eight weeks is past the end of it. Koss is the answer to a question nobody wanted to ask.

The one piece of good news Friday was Marcelo Mayer, the return from the deadline, who has been cleared for full baseball activity and could start a rehab assignment next week.

The Giants are 49-67 after beating Detroit 5-2 on Friday night, 20 games back and fourth in the National League West with 46 to play. Nothing that happens Tuesday in Philadelphia costs them a game that matters this year, and everyone involved knows it. The decision is about the four seasons still owed after this one, and the useful thing about a repair in August is that it is the version of this that does not eat into next spring.

One last note, because this site has a stake in it. On Wednesday we wrote that San Francisco could not have traded Chapman at the deadline without his permission, and then added, in a parenthesis, that he was on the injured list and there was more than one way to be untouchable in August. The injured list was the second way and we named it. What we did not know, writing off a transaction log, was that the thing underneath it was a hernia he had been carrying since the spring.

He goes to Philadelphia Sunday.