Wolters has been out of action since suffering a concussion against San Diego on May 2, when Padres hitter Hector Sanchez caught him in the helmet on his follow through.
In his second season, Wolters has shown marked improvement at the plate, hitting .346/.393/.442 in 17 games so far in 2017.
Garneau has been with the team since Opening Day and has hit .206/.260/.353 in 22 games this season. He becomes the odd man out of the Rockies catching situation because of the fact that he has options remaining and the presence of Ryan Hanigan, who is 7-for-23 with a home run since being called up as the replacement for Wolters and has drawn rave reviews from Rockies coaches and pitchers for his work behind the plate.
The Rockies are still waiting on the return of Tom Murphy, who was expected to be the team’s starting catcher, after he broke his arm in Spring Training.