Monster Energy/Pro Circuit Kawasaki’s Tyler Bowers will miss the remainder of 2015 to undergo back surgery to repair a lower lumbar issue, the team announced today. Bowers has been dealing with the issue all season, but it was determined over the 250SX West Region break that the injury would require surgery. 

“It’s a big bummer,” said Bowers in a team statement. “I love racing and love my entire Monster Energy/Pro Circuit/Kawasaki team, which is why it makes it so difficult to force myself to sit on the sidelines.”

Bowers will miss the last two rounds of Monster Energy Supercross—this weekend in Santa Clara and the finale in Las Vegas—as well as the entire Lucas Oil Pro Motocross Championship. There has been no announcement regarding plans to bring on a fill-in rider in his place. Bowers is currently fifth in West Region points and had three podiums in his return to Monster Energy Supercross after winning four-straight Amsoil Arenacross Championships.