Rockies' outfielder Matt Holliday injured his left hamstring running to first base on a groundout against the Mets on Saturday afternoon, according to The Denver Post. "I felt it grab a little bit; we'll see how it feels tomorrow [Sunday]," Holliday said. "It's tough to tell right now; I've got ice all over it." He hasn't had a hamstring injury in the past, so he's unsure of how long it'll take to heal properly. The Rockies (19-30) are ten games behind the Diamondbacks in the National League West.