ARLINGTON -- J.P. Crawford was in the third round of batting practice on Wednesday evening at Globe Life Field, and after one awkward hack, he knew something in his right side was wrong.

¡°I instantly felt it just grab,¡± Crawford said. ¡°And then I tried to take one more swing after that and knew something was up.¡±

Indeed, an MRI that Seattle¡¯s shortstop underwent before Thursday¡¯s series finale against the Rangers revealed a Grade 1 right oblique strain that landed him on the 10-day injured list.

In a corresponding move, infielder Leo Rivas was selected from Triple-A Tacoma, and to clear a 40-man roster spot for him, reliever Gregory Santos was transferred to the 60-day IL, as he isn¡¯t expected back before that timeline.

Crawford hit the IL for the first time since June 2019, aside from a stint on the concussion IL last year, when he missed 10 games in August. He said he dealt with an oblique injury in his Minors career but that it¡¯s been too long to remember. Oblique strains are typically a matter of multiple weeks, though Mariners manager Scott Servais didn¡¯t want to put a timeline on it.

¡°All of them hurt. All of them suck,¡± Crawford said. ¡°It's just that muscle [is involved] in anything you do, even walking or just coughing or sneezing, it's really sore. ... We're going to go get a game plan and see what the next week or two holds.¡±

Crawford joins outfielder Dominic Canzone among Mariners primary players on the shelf, but his presence there looms larger given that he¡¯s Seattle¡¯s leadoff man, plays a premium position, has played in more games than any of his teammates the past four years and is the club¡¯s unofficial team captain -- even considering that he¡¯s off to a slow start.

After a career year in 2023, Crawford is slashing .198/.296/.302 (.598 OPS) with two homers, one triple, one double, nine RBIs, an 18.4% strikeout rate and an 11.2% walk rate. He¡¯s been worth 84 wRC+ (league average is 100) and 0.3 wins above replacement, per FanGraphs. And before Wednesday, he had missed only one game -- a designed off-day on April 17.

¡°It's really frustrating, especially each year you find new ways to take care of your body,¡± Crawford said. ¡°And this year, my preparation has been at its best, being ready to play every day. And to just have a nagging injury like this and just having it from just taking BP, it sucks.¡±

In his stead, Dylan Moore will see Seattle¡¯s most action at shortstop. Rivas, a nine-year Minor League journeyman, will be making his MLB debut when he appears in a game and will serve as a backup utility infielder. He had an .884 OPS in 18 games at Tacoma.

Crawford¡¯s leadoff spot, however, will be more in flux based on matchups. Josh Rojas hit first on Wednesday against righty Jon Gray and opened with a triple, and Julio Rodr¨ªguez was there on Thursday, with Texas starting lefty Andrew Heaney.

Rojas has been the Mariners¡¯ most pleasant surprise in ¡®24, slashing .315/.383/.463 (.846 OPS) entering Thursday while playing plus defense at third base. Rodr¨ªguez, who¡¯s begun heating up, had 472 plate appearances of leadoff experience before the series finale against Texas. Moore could see time there, too.

¡°We'll keep mixing and matching it,¡± Servais said. ¡°Again, the guys that are going the best with the bat, I like to have those guys at the top of the lineup. Obviously, you want them to get the extra at-bat as the game goes along. I think Josh Rojas has played great. He's done an awesome job defensively. He's had really good at-bats. He puts the bat on the ball and he finds holes.¡±