Dennis and Callahan was an American morning radio show on WEEI-FM, a sports radio station in Boston, Massachusetts. On November 16, 2010, a live three-hour simulcast began airing on NESN at 6–10 AM Eastern time each weekday. The show combines talk of sports and politics, along with current or "water cooler" issues. The show premiered in 1997 with Callahan and former WHDH Sports Director John Dennis, and it received strong ratings until WEEI received ratings competition in 2009 with the launch of CBS Radio's sports station, WBZ-FM (98.5); ratings have since fallen from their peak.