Spencer, the dog for whom Boston marathoners happily stopped, dies at 13
Famous Boston Marathon Dog, Spencer, Dies At 13 After Battling Cancer
Beloved therapy dog who cheered Boston Marathon runners dies of cancer - ABC News
Your spirit inspired us all': Spencer, beloved Boston Marathon dog, dies after battle with cancer – Boston 25 News
May Our 'Boston Strong' Dog, Spencer RIP After Defying Odds
Spencer, official dog of Boston Marathon, dies at 13