Ryan Callahan retires from NHL with degenerative back disease
Tampa Bay Lightning: Ryan Callahan And Nikita Kucherov Return At MSG
New York Rangers: Ryan Callahan has to retire due to back injury
Former Lightning player Ryan Callahan announces his retirement
Ryan Callahan inspiring Lightning with 'courageous' play - The Athletic
Ryan Callahan, ex-NHL player, coming home to Rochester to teach hockey
Ryan Callahan, Cally's Crew work to help families fighting cancer - Sports Illustrated
Ryan Callahan Returns to Defeat Rangers - WSJ
Ottawa Senators acquire Ryan Callahan from Tampa Bay Lightning for Mike Condon
Lightning coach Jon Cooper says Ryan Callahan is “gonna score” on Rangers in Game 5; Callahan responds: “I'll take it” – New York Daily News
Red Wings shutting down Lightning's stars, except Tyler Johnson
Rangers trade Ryan Callahan for St. Louis
Ryan Callahan -- Tampa Bay Lightning at Boston Bruins Game 4 05/04/2018
With Veteran Help, Lightning Gain Finals - The New York Times
Former Rangers captain Ryan Callahan diagnosed with degenerative back disease