The accident left Dauer bloody. A Rockies spokesman said that Dauer, who was accompanied by Rockies assistant trainer Scott Gehret, was taken to a local emergency room for tests and evaluations. Dauer returned to the Rockies' clubhouse during the game.
For Sunday's game, first-base coach Glenallen Hill moved to third base, and catching coach Marv Foley, who travels with the team, took over first-base coach duties.
The incident occurred when Nelson and Jonathan Herrera were working on double plays. The Rockies' spokesman said that there might have been miscommunication regarding when they would begin throwing to first base, where Dauer often takes throws during batting practice.
Dauer, who turned 59 on July 27, has been a member of the Rockies' coaching staff since 2009 and has been a member of the Rockies' organization since 2006. He was also an infielder in the big leagues for nine years, playing with the Orioles from 1976-85.
Dauer was cleared to travel on the team plane after the game, according to Rockies manager Jim Tracy.