In 2015, Derkes split time between two levels in the Rockies’ minor league system, playing for both the Boise Hawks and Asheville Tourists. He hit a combined .231 with a home run and 28 RBI. He also stole 23 bases. The 21 stolen bases he amassed for Boise ranked sixth in the Northwest League.
In 2014, the San Lorenzo, Puerto Rico native was a Northwest League All-Star, hitting 10 doubles and a pair of homers while stealing 22 bases in 24 attempts for the Tri-City Dust Devils. He posted a .360 on-base percentage and finished fifth in the league in steals.
For his career, Derkes has hit .247 in 203 games with a .371 on-base percentage, three home runs, 63 RBI and has 68 stolen bases.