NEW YORK (AP) - Baseball's Mid-Summer Classic is just hours away as the best of the National League square off against the best of the American League. The rules of the game were changed a few years ago so the contest now means that the winning team secures home field advantage during the World Series for that league. On the mound this evening will be Matt Harvey of the Mets for the National League and Detroit's Max Scherzer for the American League. Harvey is 7-2 with a 2.35 ERA and leads the league with 147 strikeouts. He becomes the first pitcher from the host team to start an All-Star game since Houston's Roger Clemens in 2004 and just the 11th overall. Scherzer is 13-1 and suffered his first loss of the season Saturday against Texas. He has a 3.10 ERA and his 152 strikeouts are second in the majors to the Rangers' Yu Darvish. The annual Home Run Derby took place last night and the winner was Oakland's Yoenis Cespedes. He edged by Washington's Bryce Harper 9-8 in the final round of the eight-player competition. Cespedes is the first player left out of the All-Star game to win the Home Run Derby.