Walker Buehler wasn’t taking any chances with the early start. Instead of getting up and figuring out what roads may have been closed along the Boston Marathon route, he took his family to a nearby hotel to get ready for his Monday morning start. Wearing a white home jersey with red letters spelled out “Boston” across the front — a jersey inspired after the city rallied in the Red Sox’s first game following the Boston Marathon bombings in 2013 — Buehler threw his first pitch at 11:11 a.m. on a chilly morning at Fenway Park.