Marlins' Mosquera suspended 80 games for failed drug test
Eiver Mosquera, a 19-year-old right-hander for the Miami Marlins, was suspended for 80 games Saturday after testing positive for boldenone, a performance-enhancing substance. Mosquera is the ninth player disciplined this year under MLB's minor league drug program.
Eiver Mosquera, a 19-year-old right-hander for the Miami Marlins organization, was suspended for 80 games Saturday under the minor league drug program after testing positive for boldenone, a performance-enhancing substance, according to ESPN's reporting.
At the time of his suspension, Mosquera was 3-3 with a 4.50 ERA across nine starts and three relief appearances, playing for the rookie-level Florida Complex League Marlins and Class A Jupiter, per ESPN.
The 80-game suspension will sideline Mosquera for the bulk of a minor league season. Mosquera is the ninth player disciplined this year for a drug violation under MLB's anti-doping protocols, according to ESPN.
The suspension demonstrates that MLB's anti-doping enforcement extends throughout the minor league system, including at early developmental levels where young prospects work their way toward the majors. Boldenone is prohibited under MLB's joint drug program.
Eiver Mosquera, 19-year-old Miami Marlins right-hander, suspended 80 games for positive test for performance-enhancing substance boldenone.
Mosquera faces a suspension that will significantly impact his 2026 season. Watch for any appeal filed by Mosquera or the Marlins organization, and for updates on when he becomes eligible to return to competition.
The score is a fact. The story gets checked.
Checked and verified by the desk's automated verifier and independent approver on July 25, 2026: 1 of 1 cited source pages were fetched live and read against the story's claims. How our checks work · Report an error.
Sources
GoCheckMySports reports events. It never advises bets. Nothing here is betting or gambling advice.