The Giants recalled Koss from Triple-A Sacramento on Tuesday, Shayna Rubin of the San Francisco Chronicle reports.
The 27-year-old was demoted last week but will rejoin San Francisco with Matt Chapman (hand) landing on the injured list. Koss has a .219/.275/.266 slash line over 72 plate appearances in the majors this season and will likely fill a reserve role while up with the big club.
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Giants' Christian Koss: Sent to Triple-A
Rotowire
The Giants optioned Koss to Triple-A Sacramento on Wednesday, Shayna Rubin of the San Francisco Chronicle reports.
Koss has slashed just .219/.275/.266 this season and had seen limited playing time recently. He should see more regular reps at Sacramento as a utility infielder.
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Giants' Christian Koss: Moves back into reserve role
Rotowire
Koss is out of the lineup for Wednesday's game against the Royals, Shayna Rubin of the San Francisco Chronicle reports.
Koss had served as the Giants' primary second baseman through the first two weeks of May, but his starting opportunities are likely to be scarcer moving forward after Tyler Fitzgerald and Casey Schmitt were both activated from the injured list within the past few days. Fitzgerald will get the nod at the keystone Wednesday while Koss hits the bench for the fifth time in the last six games.
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Giants' Christian Koss: Blasts grand slam in win
Rotowire
Koss went 2-for-4 with a grand slam in Tuesday's 10-6 win over the Diamondbacks.
The Giants fell behind early, but they never looked back after Koss put them ahead with a second-inning grand slam. The infielder has gone 6-for-17 (.353 average) over his last six games, adding six RBI in that span. Overall, he's batting .241 with one home run, seven RBI, six runs scored and no stolen bases over 59 plate appearances on the season. He had nine long balls over 88 minor-league games across three levels last season, so don't expect a lot of power out of Koss. With both Tyler Fitzgerald (rib) and Casey Schmitt (oblique) on rehab assignments, Koss's time as an mainstay in the middle infield for San Francisco could soon come to an end.
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Giants' Christian Koss: Heading to bench Sunday
Rotowire
Koss is out of the lineup for Sunday's game against the Twins.
Brett Wisely will step in at the keystone while Koss takes a seat following a stretch of three consecutive starts. Since Tyler Fitzgerald (rib) joined Casey Schmitt (oblique) on the injured list May 1, Koss has started at second base in seven of the Giants' first 10 games this month while going 5-for-23 (.217) with no extra-base hits or stolen bases.
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Giants' Christian Koss: Getting steady playing time at 2B
Rotowire
Koss will start at second base and bat ninth in Sunday's game against the Rockies.
Koss will occupy the keystone for the third time in four games and could get a look as the Giants' primary option at the position after Tyler Fitzgerald (rib) joined Casey Schmitt (oblique) on the injured list. After making the Giants' roster out of spring training, Koss had seen limited playing time through the end of April, logging just 26 plate appearances over the team's first 31 games. Along with Koss, Brett Wisely is also in the mix for playing time at second base while Fitzgerald and Schmitt are on the shelf.
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Giants' Christian Koss: Records first career RBI
Rotowire
Koss went 1-for-3 with an RBI in Sunday's 3-2 win over the Rangers.
Koss lined a two-out RBI single into left field to tie the game at 2-2 in the fourth frame. The 27-year-old infielder owns a .333 batting average in his last five appearances after hitting .143 in his first seven. Koss has recorded a hit in each of the Giants' previous two games, receiving the starting nod at second base while Tyler Fitzgerald recovers from a chest contusion. Koss is now slashing .217/.280/.217 with four runs scored and a 1:8 BB:K across 26 plate appearances.
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Giants' Christian Koss: Logs first career hit Sunday
Rotowire
Koss went 1-for-4 with a run scored during Sunday's 5-4 win over the Yankees.
Koss started at second base for the third time this season, recording his first big-league hit before coming around to score on a three-run home run by Jung Hoo Lee in the sixth frame. Koss has played in five games during the 2025 campaign, scoring two runs across 11 plate appearances. The 27-year-old infielder is slashing .100/.182/.100 with a 1:4 BB:K so far this season.
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Giants' Christian Koss: Makes MLB debut Tuesday
Rotowire
Koss went 0-for-3 with a walk and a run scored in Tuesday's 3-1 win over the Astros.
Koss drew the start at second base during his big-league debut. The 27-year-old reached first on a walk in the third frame and displayed his speed by scoring from first on a two-run double by Willy Adames. Koss is expected to operate as a utility infielder for the Giants this season, though he's a candidate to receive playing time in the outfield as well, per Shayna Rubin of the San Francisco Chronicle.
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Giants' Christian Koss: Could play utility role in 2025
Rotowire
Koss is an option to slide into the outfield and could operate in a utility role this season, Shayna Rubin of the San Francisco Chronicle reports.
Koss earned a spot on the 40-man roster after a successful Cactus League campaign. The 27-year-old shortstop finished with a .341/.426/.512 slash line in 41 plate appearances as a non-roster invitee. "He's another guy I watched this spring who carried himself with such confidence," president of baseball operations Buster Posey said Thursday. "At shortstop, third -- wherever he was playing. To me, he's the epitome of a baseball player." Koss didn't suit up for the Giants on Opening Day, though the first game he gets into will mark his MLB debut after several years in the minors.
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Giants' Christian Koss: Makes MLB roster
Rotowire
The Giants selected Koss' contract from Triple-A Sacramento on Wednesday.
After a phenomenal spring that saw Koss slash .341/.426/.512 with five RBI and 12 runs scored across 47 plate appearances, Koss will be rewarded with a spot on San Francisco's Opening Day roster. The 27-year-old has spent most of his time at shortstop throughout his minor-league career but has experience at nearly every position, which helps his case for playing time. He'll be making his MLB debut whenever he gets into a game.
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Giants' Christian Koss: Candidate for utility role
Rotowire
Koss has a chance to win a utility role with the Giants this spring, the San Francisco Chronicle reports. He started at shortstop and went 1-for-3 in Saturday's spring game. "He's continuing to impress, and he hit a ball down the line for a double and he's playing with a lot of confidence," said manager Bob Melvin. "We're giving him some reps right now. It's nice to see because we're putting an emphasis on defense and he's played great defense every place we've put him."
Koss is hitting .333 (4-for-12) with a home run in eight games this spring. He's a long shot but the final bench spot appears wide open for the Giants early this spring. Koss had just a .757 OPS at Triple-A last year (54 games) and hasn't been regarded as a top prospect (he's 27 years old), but his glove could help him find a way on to the roster.
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Red Sox's Christian Koss: Promoted to Triple-A
Rotowire
The Red Sox promoted Koss to Triple-A Worcester on Tuesday, Pete Abraham of The Boston Globe reports.
Koss' .619 OPS this season with Double-A Portland doesn't exactly jump off the page, but his above-average glove has earned him a spot in Triple-A for the first time in his career. As long as his defense holds, Koss should stay put in Worcester, but he has some work to do at the plate before he can be considered for a spot in the majors.
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Red Sox's Christian Koss: Traded to Boston
Rotowire
Koss was traded from the Rockies to the Red Sox on Thursday in exchange for left-hander Yoan Aybar.
Koss was dominant during his first season in the minors in 2019, slashing .332/.447/.605 with 11 home runs, 51 RBI and 10 stolen bases over 53 games at the Rookie level. He'll continue his development with a new organization as he attempts to remain effective against higher-level competition.
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Player Bio
HT/WT: 6-1, 182 lbs
Birthplace: Riverside, CA
Age: 27
Experience: R
Bats/Throws: R, R
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