Bryan Stow hollered ''Play ball!'' and the sellout crowd roared. Stow, the San Francisco Giants fan brutally beaten outside Dodger Stadium on opening day of the 2011 season, did his part to get Game 4 of the World Series started Saturday at AT&T Park. From a wheelchair near San Francisco's dugout - and with Giants third base coach Tim Flannery and reliever Jeremy Affeldt by his side - Stow hollered, ''Welcome to the Kansas City Royals and your San Francisco Giants! Whoo! ... Play ball!'' Flannery kissed Stow on the head. He feels like he is part of the team.'' Stow also attended Game 2 of the 2012 World Series at AT&T Park.