Michael Mosiman will miss the remainder of the Supercross season after a serious practice crash while preparing for the Birmingham round at The Farm left him with a dislocated elbow, a broken radius and multiple fractures to his hand and fingers. He underwent surgery to repair the broken radius, had the elbow reduced and received treatment for fractures to his fingers and other hand injuries. In an Instagram post Mosiman called the injury “devastating,” thanked supporters, said the recovery “is not terribly long” and said he hopes to be fit in time for the Pro Motocross series.

Mosiman, who rides for Monster Energy Yamaha Star Racing, entered the crash tied for third in the 250SX West standings after six rounds with two podiums this season, including a runner-up finish at Anaheim 2 where he led laps. By withdrawing from the remaining Supercross rounds he will forfeit his pursuit of the 250SX West championship.

Star Racing announced Mosiman will miss the rest of Supercross, describing the absence as an injury-driven midseason setback while leaving open the possibility he could return for the outdoor Pro Motocross series; the team said the recovery timeline could allow a comeback in time for the Pro Motocross Championship opener on May 30 at Fox Raceway in Pala, California. The team said it will field healthy 250SX riders at the Birmingham East/West Showdown and named Haiden Deegan, Dangerboy, Max Anstie, Cole Davies, Pierce Brown, Nate Thrasher and rookie Caden Dudney. Star Racing and Mosiman warned the absence will materially affect the 250SX West title fight and his preparation for the upcoming motocross season if rehabilitation proceeds as expected.

Liqui Moly Beta Factory Racing announced it will withdraw from the remainder of the Monster Energy AMA Supercross Championship (Supercross) after both of its premier-class riders were sidelined in the opening rounds. Benny Bloss broke his wrist during press day at the Anaheim season opener, and Mitchell Oldenburg suffered a concussion and fractures to the radius and ulna in a qualifying crash in San Diego the following week.

Both riders have undergone successful surgeries and are now recovering. The team said it will forgo the rest of the Supercross season and will be removed from the Supercross points battle as it prioritizes medical care and rehabilitation. Race Team Director Carlen Gardner called the decision heartbreaking, given the riders’ strong off-season pace, but said it will give them time to recover fully before returning to competition.

Beta will redirect its full resources to contest the complete 11-round AMA Pro Motocross Championship, the team’s first full outdoor series campaign, and will still target the three-round SuperMotocross Playoffs (SMX). Team efforts will include continued development of the new Beta 450 RX and concentrated support for rider rehabilitation and conditioning.

The Pro Motocross season begins May 30 at Fox Raceway in Pala, California, and the withdrawal preserves Beta’s ability to enter every outdoor national. Team officials framed the move as an operational and scheduling response to early-season injuries that prioritizes rider health while aiming to maximize competitiveness across the outdoor schedule and postseason as the riders complete their recoveries.