"I was having a really good game, and after my fourth at-bat the trainer came up to me and told me I was taken out," Dickerson said. "I didn't really know why. Everybody kind of had a clue, but I didn't really know until [Sky Sox manager] Glenallen Hill told me."
Dickerson, the Rockies' No. 15 prospect and a non-roster invitee to Spring Training, has been an offensive powerhouse in the Minors. He leads the league in average, triples (13) and OPS (1.042), and has nine home runs, 19 doubles, 38 RBIs and 56 runs scored. Dickerson hit 32 homers in 106 games at Class A Asheville in 2011, but last year had a combined 22 in 127 games at High Class A Modesto and Double-A Tulsa.
Manager Walt Weiss said Dickerson profiles as a corner outfielder. The Rockies have two of their best hitters in the corners -- left fielder Carlos Gonzalez and right fielder Michael Cuddyer -- but Weiss said he will find at-bats for Dickerson. More chances could be possible Tuesday and Wednesday, when the Rockies play the Red Sox in Interleague games at Fenway Park. There is opportunity to use one of the regulars or use Dickerson as a designated hitter.
"He's one of those guys that everybody who has spent any time around him has loved," Weiss said. "He plays the game really hard. He kind of reminds me of a young Michael Cuddyer. He's been really good this year. It's nice to see a kid like that walk into our clubhouse."
Dickerson, an eighth-round Draft pick out of Meridian (Miss.) Community College in the 2010 First-Year Player Draft, said his wife and her family, plus his parents and brothers from Mississippi, were flying to Washington to see his debut game.
Dickerson was not in Thursday's starting lineup. He had appeared in 42 straight games, and hit .407 with seven homers, eight triples, 14 doubles and 18 walks in those games for Colorado Springs.
The Rockies designated right-handed reliever Logan Kensing for assignment to make room for Dickerson.
Thomas Harding is a reporter for MLB.com. Read his blog, Hardball in the Rockies, and follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.