Kalamazoo scored with 11 seconds left in the first overtime to win 16-15 at Calvin on Wednesday.
Tabs
Fuller helped the Hornets defeat Alma 17-11 and broke the program's single-season assist record.
Fuller earns Offensive Player of the Week while Heeren takes home Defensive Player of the Week.
The Hornets won their conference opener 17-11 over the Scots.
Kalamazoo scored seven goals in the fourth quarter to beat North Central, 15-11.
Fuller finished with seven goals and 11 assists for 18 points and set a new single-game assist record at K.