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Ben Camey Wallace(born September 10, 1974) is an American basketball executive and former professional player who played most of his career in the National Basketball Association (NBA) with the Detroit Pistons. Nicknamed "Big Ben", he is often regarded as one of the greatest undrafted players in NBA history, and is known for his shot-blocking, rebounding, and overall defensive play.

A native of Alabama, Wallace attended Cuyahoga Community College and Virginia Union University. In an NBA career that spanned from 1996 to 2012, he played with the Washington Bullets/Wizards, Orlando Magic, Chicago Bulls, and Cleveland Cavaliers as well as the Pistons. Wallace won the NBA Defensive Player of the Year Award four times, a record he shares with Dikembe Mutombo and Rudy Gobert. In nine seasons with the Pistons (2000–2006; 2009–2012), Wallace made two NBA Finals appearances (2004 and 2005) and won a championship in 2004. The Pistons retired his jersey No. 3 in 2016. Wallace was inducted into the Naismith Memorial Basketball Hall of Fame in the class of 2021.

Wallace has served as a basketball operations and team engagement advisor for the Pistons since 2021.