Wet and Cool Conditions Challenge Boston Marathon Runners.
The 127th Boston Marathon began on Monday with wet weather conditions. Marcel Hug of Switzerland won his sixth men's wheelchair crown, breaking his own course record. David Ortiz served as the grand marshal of the race. Notable runners included former Bruins captain Zdeno Chara, Red Sox players Brock Holt and Ryan Dempster, Heisman Trophy winner Doug Flutie, and tennis star Monica Rakkit. Several items, including backpacks and glass containers, were not allowed along the course.