At 6'10" and 220 lb, LaGarde played forward and center in the NBA. After spending his rookie season with the Nuggets, LaGarde spent the following two seasons with the Seattle SuperSonics.
In 1980, he was selected by the expansion Dallas Mavericks that offseason in the expansion draft. LaGarde was the only team member who played all 82 games for the Mavericks in their inaugural 1980-81 season, finishing second on the team in points to Jim Spanarkel and leading the team in rebounds and block shots.
LaGarde saw his playing time diminish the following season, averaging just 19 minutes per game in 47 games for the Mavericks. LaGarde appeared in only one game that season before suffering a season-ending calf injury.