The school announced Tuesday that Girard, former North Carolina State forward Jack Clark, ex-Air Force guard Jake Heidbreder and former UNC Greensboro forward Bas Leyte all signed with the Tigers for next season.
Girard, a 6-foot-1 guard who played four seasons for the Orange, was sixth in overall scoring in the Atlantic Coast Conference at 16.4 points a game. His addition gives Clemson the two top returning scorers in league play: Girard and returning forward PJ Hall.
Clark, at 6-foot-8, made 17 starts for the Wolfpack last season, averaging 9 points and 6.9 rebounds. Clark also played three seasons with La Salle.
Heidbreder is a 6-5 guard who was picked for the all-Mountain West third team last season after averaging 15.1 points a game.
Leyte is a 6-10 forward who started 49 games the past two seasons in his four years with the Spartans. He averaged 7.6 points and 4.3 rebounds last year.
The Tigers were 23-11 last year and finished third in the ACC, winning a school-record 14 league games.