The Who just announced that they will be postponing the first four dates on their 50th anniversary tour while Roger Daltrey recovers from a virus.

The tour will not begin on Sept 14 in San Diego as was planned and shows scheduled for Sept 16 in Anaheim and Sept 21 in Los Angeles have both been postponed. The Who will also be cancelling their performance Sept 18 at the iHeartRadio Music Festival in Las Vegas. No further details have been released.