Green Bay (17-4, 6-1), which is tied with Cleveland State, trailed 34-32 entering the second half when the game turned into a defensive battle. The Phoenix had seven blocked shots in the first seven minutes of the second and both teams went without a field goal for a six-minute stretch.
Valparaiso (18-4, 5-2) was just 5-of-27 shooting in the second half but took the lead at 48-47 with 2:56 left. The teams traded the lead three more times, the last on Greg Mays' runner with 1:43 left to cap the scoring.
Green Bay missed the front end of two 1-and-1s in the final 31 seconds, but Valpo couldn't capitalize.