![Boston Celtics' Tony Allen (L) drives on Chicago Bulls' Luol Deng during the first quarter at the United Center in Chicago on December 12, 2009. UPI/Brian Kersey Stock Photo - Alamy Boston Celtics' Tony Allen (L) drives on Chicago Bulls' Luol Deng during the first quarter at the United Center in Chicago on December 12, 2009. UPI/Brian Kersey Stock Photo - Alamy](https://l450v.alamy.com/450v/2nfx2rn/boston-celtics-tony-allen-drives-against-the-cleveland-cavaliers-in-an-nba-basketball-game-tuesday-feb-5-2008-in-cleveland-ap-photomark-duncan-2nfx2rn.jpg)
Boston Celtics' Tony Allen (L) drives on Chicago Bulls' Luol Deng during the first quarter at the United Center in Chicago on December 12, 2009. UPI/Brian Kersey Stock Photo - Alamy
![Celtics on NBC Sports Boston on Twitter: "Tony Allen didn't break the bank when he left the #Celtics as a free agent 10 years ago -- so in today's Hindsight 2020, @ASherrodblakely Celtics on NBC Sports Boston on Twitter: "Tony Allen didn't break the bank when he left the #Celtics as a free agent 10 years ago -- so in today's Hindsight 2020, @ASherrodblakely](https://pbs.twimg.com/media/EVrQBKvXQAE9YVG.jpg)
Celtics on NBC Sports Boston on Twitter: "Tony Allen didn't break the bank when he left the #Celtics as a free agent 10 years ago -- so in today's Hindsight 2020, @ASherrodblakely
![J.J. Redick remembers when Tony Allen was playing mind games with him in the 2010 ECF - Basketball Network - Your daily dose of basketball J.J. Redick remembers when Tony Allen was playing mind games with him in the 2010 ECF - Basketball Network - Your daily dose of basketball](https://www.basketballnetwork.net/.image/ar_16:9%2Cc_fill%2Ccs_srgb%2Cfl_progressive%2Cq_auto:good%2Cw_1200/MTg3MTYwOTU2MzY4ODU2OTcz/tony-allen-copy.jpg)
J.J. Redick remembers when Tony Allen was playing mind games with him in the 2010 ECF - Basketball Network - Your daily dose of basketball
![Boston Celtics guard Tony Allen pulls his jersey over his face after being called for a technical foul for exchanging words with Indiana Pacers' Reggie Miller in the third quarter during the Boston Celtics guard Tony Allen pulls his jersey over his face after being called for a technical foul for exchanging words with Indiana Pacers' Reggie Miller in the third quarter during the](https://c8.alamy.com/comp/2NGC5HP/boston-celtics-guard-tony-allen-pulls-his-jersey-over-his-face-after-being-called-for-a-technical-foul-for-exchanging-words-with-indiana-pacers-reggie-miller-in-the-third-quarter-during-the-second-game-of-their-nba-playoff-series-in-boston-monday-april-25-2005-ap-photocharles-krupa-2NGC5HP.jpg)