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An image of Perseverance’s “pet rock” stuck in the rover’s front left wheel taken on May 26. (Image credit: NASA/JPL-Caltech)

After more than a year together on the Red Planet, NASA’s Perseverance rover and its hitchhiking “pet rock” have finally parted ways. The stone had been lodged in one of the rover’s wheels for more than half of its mission on Mars.

Perseverance accidentally picked up the pet rock in its front left wheel on Feb. 4, 2022 or Sol 341 — the 341st Martian day of the mission. The rock posed no danger to the rover’s scientific mission but did manage to periodically photobomb images and cling on despite several vigorous maneuvers across the planet’s surface. Mission scientists previously likened the situation to “having a pebble stuck in your shoe.”

On April 18 (Sol 768), NASA released an image (opens in new tab) of the rover’s front left wheel showing the rock had been dislodged. In total, the rock remained in the rover’s wheel for around 439 days (427 Sols) — around 55% of the time Perseverance has spent on Mars since landing there on Feb 18, 2021. During that time, the pair traveled around 6.2 miles (10 kilometers) together. (A sol, or Martian day, is 37 minutes longer than an Earth day.)

“Farewell ‘Rock Friend,’ you will be missed,” Perseverance mission scientist Gwénaël Caravaca (opens in new tab) , wrote on Twitter (opens in new tab) .

Related: Listen to a Martian dust storm engulf the Perseverance rover in eerie, world-first audio recording

Perseverance’s now-empty wheel photographed on April 18. (Image credit: NASA/JPL-Caltech)

During its mission, Perseverance has picked up several other smaller rocks in its other wheels. But these all fell out within a couple of days or weeks of getting stuck, and posed no threat to the wandering robot. However, rocks lodged in other places have previously caused problems for the rover.RELATED STORIES—Perseverance Rover spotted from space in striking new satellite image

—Why Perseverance rover fumbled 1st sampling attempt on Mars

—Perseverance rover snaps stunning images of Mars after communications blackout  

A bunch of small pebbles fell into part of Perseverance’s inner machinery in December 2021, causing the rover to shut down for almost a week before mission scientists could figure out a way to safely remove them.

Hitchhiking rocks have also caused issues on other Mars rovers. Operators of NASA’s Spirit rover — which roamed the Red Planet between January 2004 and March 2010 — had to perform a sharp turn to shake out a “potato-sized” stone from its right-rear wheel in December 2004. Mission scientists, performed this maneuver because they feared it would cause significant damage to the rover, according to NASA (opens in new tab) .

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Brewers’ Miz scratched from start, placed on IL

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Brewers' Miz scratched from start, placed on IL

Milwaukee Brewers All-Star rookie Jacob Misiorowski was placed on the injured list with a left tibia contusion prior to his scheduled start against the Washington Nationals on Sunday.

Misiorowski told reporters that he anticipates missing about two starts and being ready to go after the 15 days. The IL move is retroactive to Thursday.

The right-hander took a liner to the shin off the bat of the Chicago CubsSeiya Suzuki in the first inning of his last start Monday. Later in the inning, after fielding a dribbler in front of the mound, Misiorowski’s knee buckled as he threw wildly to first and two runners scored.

The 23-year-old Misiorowski stayed in the game, pitching three more innings before coming out after 80 pitches.

Misiorowski is 4-1 with 47 strikeouts in 33⅓ innings this season.

In a related move, the Brewers recalled right-hander Logan Henderson from Triple-A Nashville, and he is expected to start against the Nationals on Sunday.

The Associated Press contributed to this report.

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Rockies closer Halvorsen (elbow strain) put on IL

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Rockies closer Halvorsen (elbow strain) put on IL

DENVER — The Colorado Rockies have put closer Seth Halvorsen on the 15-day injured list with a right elbow strain after he had to leave Saturday’s win over Pittsburgh.

Interim manager Warren Schaeffer said at the time the injury didn’t look good — following the right-hander’s exit after throwing five pitches in the ninth inning. Halvorsen leads the Rockies with 11 saves.

Colorado also recalled right-hander Nick Anderson and catcher Braxton Fulford from Triple-A Albuquerque on Sunday, and the Rockies optioned infielder Michael Toglia to Albuquerque.

The 25-year-old Halvorsen is 1-2 with a 4.99 ERA this year. He made his big league debut in August of 2024.

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Braves-Reds showcase at Bristol stalled by rain

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Braves-Reds showcase at Bristol stalled by rain

BRISTOL, Tenn. — It was a red flag for Major League Baseball at Bristol Motor Speedway on Saturday night.

The Speedway Classic between the Atlanta Braves and Cincinnati Reds was suspended in the first inning because of rain, soaking a record-breaking crowd for the first regular-season game in Tennessee. The plan is to resume the game on Sunday at 1 p.m. ET.

The first delay at the historic bullring of a racetrack came after the ceremonial first pitch featuring a pair of Hall of Famers in Johnny Bench and Chipper Jones, joined by NASCAR drivers Kyle Busch and Chase Elliott. The second with one out in the bottom of the first led to the game being pushed back a day.

Fans who stuck out the first delay of 2 hours, 17 minutes started heading toward the exits before the game was postponed with the Reds holding a 1-0 lead.

It was an unwelcome detour for the long-planned event mixing baseball and NASCAR.

“We’re going to suspend tonight’s game. … We are optimistic for a better weather forecast for tomorrow,” Michael Hill, MLB’s senior vice president of on-field operations, told Fox.

The rain made life difficult on the players before the suspension. A bat flew out of TJ Friedl‘s hands as he led off for the Reds. A pitcher seemed to catch his footing going to cover first base.

The Speedway Classic was announced nearly a year ago as part of commissioner Rob Manfred’s push to take MLB to places where baseball isn’t played every day live. MLB played a game at the “Field of Dreams” movie site in Iowa in 2021 and 2022. Games have been held in Alabama and North Carolina too.

Reds pitcher Andrew Abbott showed up Saturday afternoon at Bristol wearing a cutoff version of a NASCAR race suit. Born in Lynchburg, Virginia, Abbott said he wanted something to wear in for a special game.

“I grew up around NASCAR,” Abbott said. “Just went on eBay and found a couple options, and luckily that was the one that arrived in time. I had a couple of backups. I know who Rusty Wallace is too, so I actually do know the backstory behind it.”

Long before the fans departed in the rain, they were entertained by a 110-foot Ferris wheel along with food trucks, live music, pitching tunnels and batting cages. Fans also had a chance for photos with the Commissioner’s Trophy and Clydesdales outside the historic racetrack.

Inside, star Tim McGraw performed and was joined by Pitbull.

Before the weather moved over the area, players stood in the back of pickup trucks with their numbers emblazoned on the side and rode around the half-mile racetrack. Some used their phones to document the moment. For introductions, the Braves and Reds walked between a pair of cars decked out in Atlanta and Cincinnati colors.

Then the tarp came out as rain that had been falling around Bristol much of Saturday turned heavy and delayed the start.

The first delay led to the Braves switching starting pitchers. Spencer Strider, who grew up in nearby Knoxville, got a bigger ovation than Reds starter Chase Burns, who is from Hendersonville and played at the University of Tennessee. The Reds stuck with Burns despite the delay.

Strider warmed up. The Braves chose not to risk his third start in this situation coming off a second elbow surgery and turned to Austin Cox.

The rain stopped long enough to take off the tarp and start the game.

Michael Waltrip, who raced plenty at Bristol, restarted the festivities by quoting his brother Darrell: “Boogity, boogity, boogity. Let’s play baseball, boys!”

Atlanta went down in order in the top of the first inning. But there was another rain delay after Austin Hays hit an RBI single for Cincinnati in the bottom half.

MLB didn’t try to sell every ticket inside the speedway that drew 156,990 for the Battle of Bristol college football game in 2016. The track with a racing capacity of 146,000 could host 90,000 or more even with sections blocked off.

Officials announced Monday that more than 85,000 tickets had been sold, topping the previous paid attendance of 84,587 set Sept. 12, 1954, when Cleveland Stadium hosted the New York Yankees.

A batter has to clear 400 feet to hit anything out of center field, 375 in the alleys and 330 down each baseline. Pulling a ball down the line raises the prospect of a ball bouncing off the racetrack beyond the outfield wall.

“Honestly, my first thought: I can’t believe they did all this for one game,” Braves first baseman Matt Olson said of his first visit to Bristol. “To be able to set all this up, get a playing surface ready, set the stands up in order to have the proper viewing, it’s pretty incredible.”

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