The operator of the carnival ride that injured 23 people when it collapsed at the Calaveras County Fair on Friday had two less serious accidents on different rides six years ago. The California Occupational Safety and Health Administration says one boy broke both wrists in 2002 and two other boys had minor injuries when a Brass Ring Amusements employee started a Skywheel ride prematurely at the Stanislaus County Fair. And later that year a boy broke his wrist and another bumped his head at the Tehama County Fair because the company's Zipper ride was out of balance and the brakes needed adjustment. Cal-OSHA spokeswoman Kate McGuire says neither accident was as bad as the malfunction of the company's Yo-Yo ride at the Calaveras County Fair and Jumping Frog Jubilee. Three people were hospitalized, but all have since been released.