Which Suns rookie was suspended for the entire season by the NBA in 1991?

Phoenix Suns rookie Richard Dumas was suspended by the NBA for the entire 1991–92 season.

Dumas was selected by Phoenix in the second round of the 1991 NBA draft with the 46th overall pick. He impressed the Suns during training camp, but the league suspended him for violating its substance-abuse policy before he could play his official rookie season. The suspension meant that none of Phoenix's three 1991 draft picks appeared for the team during that season.

The Suns were building a championship-caliber roster at the time. They also drafted center Chad Gallagher and guard Joey Wright, but both were cut before the regular season. Phoenix acquired Charles Barkley from Philadelphia in June 1992, and Dumas returned for the following campaign, making 1992–93 his effective NBA rookie season.

Dumas showed considerable talent when he finally played, averaging 15.8 points per game in 48 appearances during the 1992–93 season. The Suns reached the NBA Finals that year but lost to Michael Jordan's Chicago Bulls in six games. Dumas's suspension is therefore tied to the 1991–92 season, not his later return.