The Giants placed ace right-hander Jason Schmidt on the 15-day disabled list Tuesday with a strained right shoulder, the latest injury to a San Francisco star this season. Schmidt struggled in his last start, allowing six runs, six hits and six walks in 3 2-3 innings against Washington. The walks were his most since Aug. 15, 2002, when he issued seven against Atlanta. Schmidt, an 18-game winner last season, is 2-1 with a 4.71 ERA and hasn't won since April 10 against Colorado.