The heat took a major toll on players and umpires alike in a game between the Seattle Mariners and Chicago Cubs on Saturday at Wrigley Field. The temperature exceeded 90 degrees with dry winds close to 20 mph. Home plate umpire Chad Whitson exited the game before the sixth inning and was treated by an EMT due to apparent heat exhaustion. Mariners reliever Trent Thornton was also plagued with a heat illness and was helped to the dugout in the bottom of the eighth after 2.1 innings pitched.