Madison Bumgarner did not have to prove his mettle to anybody.He checked that box in indelible ink when he pitched eight shutoutinnings in his first World Series start as a 21-year-oldrookie. If any skeptics remained, Bumgarner gave them Exhibit B onSunday night, when he overcame his historically bad start againstMinnesota by going on national television, striking out acareer-high 11 and holding Cleveland to one run over seven inningsin a 3-1 Giants victory. "He's a big kid with a good head on his shoulders," relieverJeremy Affeldt said. "This is bigger than just a good outing forhim. This is big for his maturity. I'm sure everyone from thecoaching staff to the manager is proud of him."