The Seattle Mariners farm system is considered one of the best in baseball, with nine prospects ranked in MLB Pipeline's top 100 and eight prospects ranked in Baseball America's top 100.

One of those highly-ranked minor leaguers will miss the rest of the season after an impressive first pro year.

Right-handed starting pitcher Ryan Sloan, who the Mariners picked in the second round of the 2024 MLB Draft, underwent a procedure on his eye, according to a post on "X" from MLB.com's Daniel Kramer.

According to Kramer's report, the surgery will keep Sloan out for two-to-three weeks, which will end his season. The minor league affiliate Sloan pitches for, the High-A Everett AquaSox, will compete in the Northwest League Championship Series from Sept. 9-14.

Seattle general manager Justin Hollander said that there's "no concerns long term" with Sloan's injury, according to Kramer's report.

Sloan is ranked the No. 41 prospect in baseball according to MLB Pipeline's top 100 and No. 66 according to Baseball America's top 100.

Sloan was considered one of the best high school pitching prospects in the 2024 MLB draft, and was part of a pitcher-heavy class for the Mariners. The organization selected ambidextrous hurler and fellow top 100 prospect Jurrangelo Cijntje out of Mississippi State in the first round.

Sloan began his pro career with the Single-A Modesto Nuts this season. He posted a 3.44 ERA with 77 strikeouts in 70.2 innings pitched across 18 starts.

Sloan was promoted to Everett on Aug. 10. He made three starts for the AquaSox and had a 5.56 ERA and fanned 13 batters in 11.1 innings pitched. In total, Sloan posted a 3.73 ERA with 90 strikeouts in 82 innings pitched across 21 starts in his first professional season.

Sloan tied his career-high in strikeouts (seven) in his last outing of the season for the AquaSox against the Eugene Emeralds on Aug. 30.

Sloan was considered to have one of the strongest arms of the prep pitching prospects in the 2024 draft, but has worked this season in developing his slider, changeup and cutter to work off his heater.

"I think it's been my main focus," Sloan said in a postgame interview Aug. 30. "Changeup has come a long way, slider has been really good, picking up the cutter. I think everything's come along well."

Sloan, Cijntje and 2025 first-round pick, left-hander Kade Anderson, are all top 100 prospects and considered featured players for the future of Seattle's starting rotation.

Anderson and Cijntje are projected for 2027 call-ups and Sloan is expected to make his major league debut in 2028, according to MLB Pipeline.