The one that started it all; July 1, 1987, WFAN Sportsradio. Originally, was on 1050 AM and owned by Emmis Broadcasting, the first
All-Sports Station to pioneer the All-Sports Format. Moved to 660 in 1988, which was formerly occupied by WNBC, and then bought out by CBS Radio after deregulation in the 1990s. Home to Imus In the Morning, Mike and the "Mad Dog", the NY Mets, Rangers, Knicks, and Giants. Sister Station NewsRadio 8-80 WCBS is the Flagship for the NY Yankees. WNEW-FM and Bloomberg's WBBR handle overflow play-by-play
ABC's Owned & operated, New York ESPN Radio station. WFAN originally started on this frequency. In past lives this frequency was also home to WHN & WEVD. Michael Kay from the YES Network & Wally Matthews have shows on 1050 ESPN Radio
New York's Sporting News Radio affiliate. Has been converted to mostly brokered programming
Boston's First All-Sports Station. Flagship for the Boston Red Sox.
Boston's Sporting News Radio Affiliate: The Flagship for the Boston Celtics
Philadelphia's Sports Talk Leader. The second radio station to go to All-Sports (Dec. 7, 1987). Flagship for the Flyers and 76ers, and home to the annual "Wing Bowl"
Pittsburgh's first all-sports staion. WEAE, in a former life was WTAE. Owned by ABC and home to the controversial talkshow host Mark Madden.
Clear Channel's SportsRadio entry into Pittsburgh
Clear Channel Washington D.C.'s Sports Stations. 980 is and ESPN Radio affiliate, the flagship for the Washington Capitals and Wizards, and Steve Czaban's home station. 1260 is the home of NASCAR on the radio and used as an overflow station for 980. John Thompson and "The Sports Reporters"
afternoon shows are simulcasted on both stations
Buffalo's Sports Leader 550AM WGR. I don't know if they are the Bills Flagship, but they are a NY Yankee affilliate
Syracuse's Sports Leader SportsRadio 620 WHEN. Another upstate New York, Yankee affiliate. I've always liked their logo. WSNR 620 in New York City has to null their signal at night to protect WHEN.