Dickerson has missed the last 29 games with plantar fasciitis and has hit .299/.331/.512 with five home runs in 38 games this season after he hit .312/.364/.567 with 24 home runs in 2014.
With Dickerson batting sixth, that pushes first baseman Ben Paulsen to seventh and catcher Nick Hundley to eighth, with second baseman DJ LeMahieu remaining in the second spot in the order.
Rookie Eddie Butler will be on the mound for the Rockies in what is technically his first start back from a stint in Triple-A, he did pitch four shutout innings against the Padres Sunday in a game that was rained out before becoming an official contest.
Reds manager Bryan Price will bat pitcher Anthony DeScalfani eighth against Butler, with center fielder and major league stolen base leader Billy Hamilton batting ninth. Hamilton has hit just .226/.272/.294, but is a threat on the bases with 45 steals against just seven times caught. Second baseman Brandon Phillips hits leadoff for the Reds with first baseman Joey Votto batting second.
DeScalfani will be pitching at Coors Field and against the Rockies for the first time in his career. He has a 3.99 ERA and 1.38 WHIP in 106 innings this season.
First pitch tonight is at 6:40 p.m. Mountain time.