Corey Dickerson's locker sits at the entrance of the visiting clubhouse, a few feet from the lunch room and miles away from Colorado Springs. Saturday, the 24-year-old stood up from his chair and checked the lineup on the eraser board in the hallway. He sat back down. Looked into his locker. Stood up and checked it again. Reality, check please. After years of playing on the fields in McCombs, Miss., after growing up idolizing Braves star Chipper Jones, after excelling at Brookhaven Academy and Meridian Community College, after 1,442 minor-league at-bats, Dickerson had finally arrived. The party started when he walked to the plate. With the team needing a jolt, Dickerson provided a burst of energy, delivering doubles in his first two at-bats in the Rockies' 7-1 victory over the Nationals on a warm Saturday afternoon. When Dickerson was called up to provide depth for an injured and aching outfield, manager Walt Weiss compared him to Michael Cuddyer. He doesn't have the outfielder's power, but he plays like a can of human Red Bull. He was part of a first-inning eruption that was nearly a week in the making, one that prevented Jhoulys Chacin's terrific outing from being wasted. The Rockies staggered into Saturday's game winless on their road trip, batting .183 in their previous five games while scoring seven runs. They matched that total in eight innings. The first at-bat established the narrative, and provided a thread for Dickerson's memorable debut. With the Rockies already leading 2-0 after DJ LeMahieu's first home run and Cuddyer's single, Dickerson belted a liner into center field.