The last time the San Francisco Giants started Madison Bumgarner in an American League ballpark they let him bat. On June 30, the Giants forfeited their designated hitter and Bumgarner went 1-for-4 in a 12-6 win at Oakland. The game-time temperature in Oakland when Bumgarner batted was 66 degrees, but when the Giants take the field at Yankee Stadium on Friday night for the opener of their three-game series against the New York Yankees, the weather is projected to be significantly hotter.