Two of baseball's hottest teams since the All-Star break collide Monday night when the Chicago Cubs and host San Francisco Giants open a three-game series. The Cubs flew to San Francisco after Sunday's 5-1 home loss to San Diego, yet quite possibly will be the fresher of the two teams when the series begins. Having already played a doubleheader and a 10-inning game at Colorado earlier in the week, the Giants needed 47 innings to take three of four from the Mets, getting a boost Sunday from two guys making their major league debuts: pitcher Conner Menez and third baseman Zach Green.