The Rockies placed Karros on the 7-day injured list Sunday due to a concussion.
The 24-year-old was activated from the concussion IL on Friday but will quickly return after experiencing additional symptoms. Karros will be sidelined for at least another week while he goes through the league's protocols. Ryan Ritter was called up from Triple-A Albuquerque in a corresponding move and is starting at second base Sunday against the Guardians, with Willi Castro sliding to the hot corner.
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Rockies' Kyle Karros: Returning from concussion IL
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The Rockies activated Karros from the 7-day injured list Friday.
Karros wound up missing a little over a week with his concussion symptoms. He did not embark upon a rehab assignment, but the third baseman ramped up on-field workouts this week to clear the path for his return to the Rockies' lineup. Karros has had a nice first full season in the big leagues, sporting a .265/.361/.424 slash line with 10 home runs in 116 contests.
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Rockies' Kyle Karros: Likely back for weekend series
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Karros (concussion) has resumed baseball activity at Colorado's team complex in Arizona, MLB.com reports.
Karros is eligible to return from the injured list Wednesday, but that does not seem likely. Instead, it's suggested that Karros is trending toward activation for Colorado's weekend series against the Guardians.
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Rockies' Kyle Karros: Shut down due to concussion
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The Rockies placed Karros on the 7-day injured list Wednesday due to a concussion.
Karros hit a game-tying two-run home run in the top of the sixth inning of Tuesday's 3-2 win over the Diamondbacks, and then left the game in the bottom half of the frame after colliding in the field with teammate Ezequiel Tovar while both were pursuing a grounder. Per David Brandt of the Associated Press, Rockies manager Warren Schaeffer said after the game that Karros entered concussion protocol. With that, Karros will be held out of action for the next week, which likely clears the way for Willi Castro to serve as the Rockies' primary third baseman in the interim.
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Rockies' Kyle Karros: Resting up Sunday
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Karros is out of the lineup for Sunday's game against the Royals.
After recently missing time due to a left biceps injury, Karros returned to the lineup for the first two games of the series with the Royals, going 4-for-8 with a double, three runs and two RBI across those contests. Karros appears to have avoided any setbacks with his biceps coming out of those games, but he'll get a breather for the series finale.
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Rockies' Kyle Karros: Two more hits
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Karros went 2-for-5 with a double, two RBI and two runs scored Saturday against the Royals.
Karros began a four-run rally for Colorado in the third inning with a bases-loaded double. He's begun the Rockies' current homestand hitting well, going 4-for-8 with two RBI and three runs scored across two games. He's maintained a .300 batting average with four homers, 14 RBI and 16 runs scored across 23 games since the start of July.
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Rockies' Kyle Karros: Remains out Wednesday
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Karros (biceps) remains out of the lineup for Wednesday's contest in San Diego.
Karros had to be scratched from Tuesday's lineup with left biceps inflammation and will now miss a second straight start. The Rockies are idle Thursday, so Karros will aim to return to action Friday when the Rockies return home to host the Royals. Willi Castro will fill in again at the hot corner Wednesday in Karros' stead.
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Rockies' Kyle Karros: Resting up Saturday
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Karros isn't in the lineup for Saturday's game against the Reds.
Karros will retreat to the bench Saturday after going 0-for-4 with a run scored during a 7-2 loss in Friday's series opener. While Karros rests, Willi Castro will start at the hot corner and bat fifth.
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Rockies' Kyle Karros: Slugs fifth homer
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Karros went 1-for-3 with a two-run home run Saturday against the Twins.
Karros had been out of the lineup against three of the last four righties Colorado faced, but he rejoined the lineup Saturday and hit eighth. He delivered on the opportunity by slugging a two-run homer in the eighth frame, his fifth of the season. Karros now has two long balls in his last six starts, though it's unclear whether that will be enough to help him regain playing time.
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Rockies' Kyle Karros: Reps versus righties slipping
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Karros is absent from the lineup for Friday's game in Minnesota.
Karros has now been out of the lineup three of the last four times the Rockies have gone up against a right-hander. Colorado will shift Willi Castro over to third base once again, with Edouard Julien covering second base.
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Rockies' Kyle Karros: Idle Saturday
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Karros isn't in the lineup for Saturday's game against Pittsburgh.
Karros will get a breather Saturday after going 0-for-3 during Friday's game. Willi Castro will slide to the hot corner while Karros sits, giving Edouard Julien a start at second base.
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Rockies' Kyle Karros: Adds late homer
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Karros went 1-for-4 with a three-run home run in Tuesday's 15-6 loss to the Dodgers.
Karros' homer came off position player Miguel Rojas in the ninth inning. They all count the same in the box score, and for Karros, this long ball ended a stretch of 29 contests without a homer and eight games without an extra-base hit. The third baseman is batting .208 with a .603 OPS, two homers, 14 RBI, 19 runs scored, seven doubles and two stolen bases over 52 games. That production is mostly similar to what he showed in his first 43 big-league contests last year.
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Rockies' Kyle Karros: Spectating with righty on mound
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Karros is out of the lineup for Sunday's game against Atlanta.
Karros will hit the bench for the second time in the series, with both of his absences coming against right-handed starting pitchers. Willi Castro will step in at third base in place of Karros, who has a modest four-game hitting streak going but has cobbled together an underwhelming .213/.339/.277 slash line over 115 plate appearances on the season.
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Rockies' Kyle Karros: Hits first homer of season
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Karros went 2-for-3 with a solo home run, an additional run scored and a walk in Sunday's 9-6 win over the Dodgers.
Karros blasted his first homer of 2026, turning on a Roki Sasaki fastball and sending it 448 feet into the left-field bleachers in the fifth inning. In addition to being his first long ball, it marked the third baseman's first extra-base hit since March 29, when he doubled against the Marlins. With just a .633 OPS through 22 games, Karros will look to build on this performance and find his stride at the plate.
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Rockies' Kyle Karros: Sitting in series opener
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Karros isn't in the lineup Thursday versus the Padres.
Karros got his first lineup omission of the season Sunday, but he started in all three games in the series versus Houston afterwards. The third baseman went 2-for-7 with four walks and an RBI in the three-game set that concluded Wednesday. With the 23-year-old on the bench again Thursday, Willi Castro shifts to the hot corner and Edouard Julien is starting at second base.
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Rockies' Kyle Karros: Earns roster spot
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Karros will begin the 2026 season on the big-league roster, Thomas Harding of MLB.com reports.
Karros was the favorite to claim the third-base job coming into spring training, and his performance during the exhibition season aligned with those expectations. He collected 15 hits -- four of which went for extra bases -- and struck out only nine times in 41 plate appearances. Karros will presumably draw the majority of starts at third base to begin the season, though his role hasn't been defined.
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Rockies' Kyle Karros: Two hits Tuesday
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Karros went 2-for-4 with an RBI on Tuesday against the Mariners.
Karros recorded an RBI in his second consecutive game after knocking in a run with a single in the second inning. He remains the Rockies' primary third baseman, starting 16 of 20 games in September. However, Karros has hit only .222 with three RBI and six runs scored in that span.
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Rockies' Kyle Karros: Giving way to Farmer on Wednesday
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Karros is out of the lineup for Wednesday's game against the Marlins.
Kyle Farmer will get the nod at third base Wednesday while Karros retreats to the bench for the second time in three games. Karros has received the majority of the starts at the hot corner in September but is slashing just .214/.267/.238 in 12 games so far this month.
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Rockies' Kyle Karros: Taking seat Sunday
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Karros is out of the lineup for Sunday's game against the Padres.
Karros will hit the bench after he started in each of the last six games while going 2-for-20 with one walk and six strikeouts. Kyle Farmer will step in for Karros at third base and will bat seventh.
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Rockies' Kyle Karros: Hitting well since return
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Karros went 2-for-4 with two runs scored Tuesday against the Astros.
Karros was briefly sidelined with a back injury but returned to the lineup Friday and has started four straight games since -- all of which have come on the road. He's gone 5-for-13 while hitting primarily in the bottom third of the lineup.