Blackmon sent to minors by Rockies

Charlie Blackmon was 2-for-4 with a homer, two RBIs and two runs scored in his first game after being called up from the minors by the Colorado Rockies in mid-May. But the former North Gwinnett and Georgia Tech standout quickly cooled at the plate.

His average down to .240 through 25 at-bats and no homers or RBIs since his season debut, Blackmon was optioned back to Class AAA Colorado Spring when the Rockies decided to add an extra relief pitcher to the roster because of a busy schedule.

The 26-year-old former second-round draft choice was 2-for-3 with a stolen base on Monday against Houston, but he had just one hit in his previous 14 at-bats.

"I got here and played right away, so it's not like they didn't give me an opportunity," the outfielder told the Denver media. "I'm sure if I'd done a better job with that chance, I'd have played much more."

Blackmon had a .336 average with 15 extra-base hits and 21 RBIs in 31 games when he was called up from the Pacific Coast League. He had a .452 on-base mark thanks to 23 walks and was slugging .545.

An infection in his left knee kept Blackmon from having a chance to make the team out of spring training. He played parts of the previous two years with the Rockies, his 2011 rookie season ended by a broken foot suffered during a game against the Braves in Atlanta.

"I'll go back to Colorado Springs and try to do the best I can," said Blackmon, who has a .267 average with four homers and 91 RBIs in 81 career games with the Rockies.

With Nick Green designated for assignment by Miami and Blackmon sent back to the minors, Gwinnett is down to four high school products active in the majors -- Brian McCann (Duluth) of the Braves, Jeff Francoeur (Parkview) of the Royals, Jeff Keppinger (Parkview) of the White Sox and Collin McHugh (Providence Christian) of the Mets.