CBS News: A walk-off catcher's interference may be rare for MLB, but Phillies rookie Otto Kemp has been here before Walking off on a catcher's interference is one of those feats in MLB that is as scarce as can be. Since 1920, only one team had walked off on a catcher's interference to end a game prior to the ... A walk-off catcher's interference may be rare for MLB, but Phillies rookie Otto Kemp has been here before The Boston Globe: Catcher’s interference calls are on the rise, but the Red Sox losing on the play was exceptionally rare Catcher’s interference calls are on the rise, but the Red Sox losing on the play was exceptionally rare WCBD: Phillies beat Red Sox in first MLB game won by walk-off catcher’s interference since 1971 Phillies beat Red Sox in first MLB game won by walk-off catcher’s interference since 1971 WCBD: Phillies claim another wild, walk-off win on catcher’s interference with bases loaded in 10th