Contreras is not in the lineup for Friday's game against the Mariners.
With Jon Lester on the mound for the Cubs on Friday, David Ross -- who regularly catches Lester -- will get the start behind the plate. Contreras started at a different position five of the last six times Lester was on the mound, but the returning Chris Coghlan will enter the lineup Friday instead. With Coghlan providing another option in the outfield moving forward, Contreras' playing time could take a bit of a hit.