Mother Nature spoiled the second game of the Philadelphia Phillies-Colorado Rockies series last night, and could prevent today's scheduled split double-header. But the break could be good for the Rockies, who are struggling due to poor clutch hitting, an inconsistent pitching rotation, and injuries. Colorado sits two games ahead of the Arizona Diamondbacks for the last spot in the National League West, and five games behind division-leading San Diego (via MLB.com). The Denver Post partly faults regular studs, such as Todd Helton, who have been in hitting slumps and failing to drive in base runners. The Post's Troy Renck also reviews the Rockies' bullpen problems, noting that another pitcher, Franklin Morales, is heading to the disabled list to clear room for starter Jason Hammel to return to the team after dealing with a strained groin. The bullpen has the second-lowest ERA in baseball but has blown four of seven saves without the services of injured closer Huston Street, who was shut down with shoulder stiffness during spring training. Street could return--barring any major setbacks--May 25, when the Rockies face Arizona at Coors Field. And shortstop Troy Tulowitzki, who left a weekend game with a strained quadriceps, managed to stay off the disabled list and remains day-to-day. The weather postponements could mean Tulo will return in time for Thursday's game against the Washington Nationals.