Alonzo Mourning Jr. is a professional basketball executive and former player. Mourning played college basketball for John Thompson at Georgetown University. Mourning finished his college career with 2,001 points and 1,032 rebounds, reaching the exclusive 2,000-point/1,000 rebound milestone.

Following his college basketball career at Georgetown University, his tenacity on defense twice earned him the NBA Defensive Player of the Year Award and twice placed him on the NBA All-Defensive Team. Mourning played most of his 15-year NBA career for the Miami Heat. Mourning made a comeback after undergoing a kidney transplant and later won the 2006 NBA championship with the Heat. Mourning also played for the Charlotte Hornets and New Jersey Nets.

On March 30, 2009, Mourning became the first Miami Heat player to have his number retired. In 2010, Mourning was inducted into the Virginia Sports Hall of Fame. In August 2014, Mourning was inducted into the Naismith Memorial Basketball Hall of Fame, and in August 2019 he was inducted into the FIBA Hall of Fame. Since June 2009, Mourning has served as Vice President of Player Programs and Development for the Heat.