Philadelphia Phillies retire Dick Allen's No. 15 in moving ceremony - ESPN
Happy Royals Retired Numbers Day!, by Nick Kappel
10 greatest Phillies players of all time, ranked
The story behind the Phillies' longstanding rule on retired numbers: Will they ever change it for 6, 11 and 26? - The Athletic
Phillies to retire Dick Allen's No. 15 during 2020 MLB season
Retired numbers: Philadelphia Phillies - by G. Scott Thomas
The story behind the Phillies' longstanding rule on retired numbers: Will they ever change it for 6, 11 and 26? - The Athletic
The Phillies need to retire Jimmy Rollins, Chase Utley and Ryan Howard's numbers. But first, they have to ditch their own rule about it.
This Day in Braves History; Hank Aaron has his number retired by the Atlanta Braves. - Battery Power
Philadelphia Phillies retire Roy Halladay's No. 34 jersey in tribute to late ace - ESPN
Predicting the Next Retired Number for Every Team - The Crawfish Boxes
Philadelphia Phillies retired numbers