The San Francisco Giants transferred right-hander Johnny Cueto to the 60-day disabled list Thursday as he recovers from a sprained elbow expected to sideline him six to eight weeks. The move means Cueto, originally placed on the 10-day DL on May 1, won't return to the rotation until June 30 at the earliest, as the Giants will exercise caution with the 32-year-old. With the open 40-man roster spot, the Giants promoted right-hander Jose Valdez from Triple-A Sacramento, optioning right-handed reliever Derek Law to Sacramento in a corresponding move.