Based on my research, there's only one Alan Hardy who played in the NBA:

Alan Timothy Hardy (born May 25, 1957) was a retired professional basketball shooting guard who played for two seasons (1980-1982) in the National Basketball Association (NBA) as a member of the Los Angeles Lakers and the Detroit Pistons . Drafted undrafted in 1979, the 6-foot-7 shooting guard from the University of Michigan averaged 3.2 points per game in his NBA career.

An interesting trivia about Alan Hardy is that he played for his hometown team, the Detroit Pistons, during the 1981-1982 season. There's even a YouTube video showing one of his dunks during a Pistons-Lakers game YouTube: [invalid URL removed].