Beginning spring 2007 and lasting through 2009, northbound and southbound Purple Line Express trains stop at Sheridan before Chicago Cubs weekday night games in order to provide more service to nearby Wrigley Field. Previously, trains had stopped at the Addison station to the south but that station does not have platform access to the express tracks as Sheridan does, which required Purple Line trains to cross over to the Red Line tracks. In order to prevent this from adding to delays caused by the Brown Line reconstruction, the stop was moved to Sheridan. Recently, Inbound Express Purple Line has begun stopping at Sheridan as well as Wilson and Addison during Morning Rush Hour.
As part of the recommended Red & Purple Modernization Project, the Sheridan station will potentially be replaced with a new Irving Park station if the CTA decides not to go with the "no action" alternative.
Although the station has two island platforms—potentially giving access to all four tracks that run through the station—normally only the Red Line, which runs on the inner tracks, stops at the station. The outside tracks are used during weekday rush hours by Purple Line Express trains, which typically pass through the station without stopping on the express leg of their route between Howard and the Loop.