During his Seattle SuperSonics tenure, Allen achieved many individual accomplishments. On March 12, 2006, Allen became the 97th player in NBA history to score 15,000 points. On April 7, 2006, Allen moved into second place on the NBA's list of all-time 3-point field goals made, trailing only Reggie Miller. On April 19, 2006, Allen broke Dennis Scott's ten-year-old NBA record for 3-point field goals made in a season in a game against the Denver Nuggets. The record has since been broken by Stephen Curry.