Yovani Gallardo tossed eight scoreless innings to become baseball’s fourth seven-game winner as the Brewers beat the Giants 6-0 on Sunday. Gallardo, who opened the season with a 6.10 ERA in seven starts, joined Jon Lester, Kevin Correia and Cole Hamels at seven victories.  He’s 5-0 with a 1.29 ERA in his last five outings. With…