U.S. goalkeeper Tim Howard pulled a muscle in his right leg during Friday night's 2-1 loss to Mexico in a World Cup qualifier and was replaced by Brad Guzan late in the first half. Howard, who just regained the starting job from Guzan, was hurt while taking a goal kick about 35 minutes in. Howard was to have a scan Saturday, and U.S. coach Jurgen Klinsmann said he was doubtful for Tuesday's qualifier at Costa Rica. More...