The San Francisco Giants placed second baseman Joe Panik on the 10-day disabled list and outfielder Mac Williamson on the seven-day concussion list prior to Saturday's doubleheader against the Los Angeles Dodgers. It's believed Panik suffered a sprained left thumb during Friday's victory over the Dodgers. San Francisco added right-hander Chris Stratton from the paternity list to start Game 1 of the doubleheader.