Herrera, 21, is considered a future leadoff hitter. He is batting .276 with a .315 on-base percentage at Class A Advanced Modesto. He has two home runs and 16 RBIs.
Last year, Herrera, listed at 6-foot-3, 190 pounds, batted .343 with a .419 on-base percentage at Class A Asheville. He also received a long look during Spring Training as the Rockies gave veteran Troy Tulowitzki ample rest.
Thomas Harding is a reporter for MLB.com. Follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.