Robert Parish
With the Celtics, Rivas had the opportunity to share playing time alongside Larry Bird, Kevin McHale, Dennis Johnson, Robert Parish, Reggie Lewis, and Brian Shaw, among others. The Celtics reached the playoffs, by beating the Washington Bullets by two games, for the eighth and final playoff spot in the NBA east that year, but were swept in three games, by the eventual champion Detroit Pistons, in the playoffs' first round.