Sullivan have guaranteed a semi-final place from the group stage with a game in hand.
Sullivan played Grosvenor in their fourth game of the group stages of the McCullough Cup. Sullivan were dominant in the game with keeper Tom McCord hardly touching the ball before being replaced in the last 10 minutes by Harrison Dunlop.
Grosvenor spent the game in their own half and suffered a 10 nil defeat.
Sullivan 10 (M Morris 3, F Gibson 2, D Girvin 2, S Erskine, P Crookshanks & T McClintock)
Sullivan will face Campbell College in their final group game