At Chapman, Rock Creek picked up its fifth win of the season Tuesday, beating Chapman 45-37.
The Mustangs (5-11) led 7-2 after the first quarter and 20-8 by halftime. The Irish (1-14) tried to get back in the game in the third quarter, cutting the lead to 26-17.
The teams got in a shootout in the fourth quarter, with Chapman outscoring Rock Creek 20-19, but the Mustangs hung on to win.
Morgan Feldkamp led the Mustangs with 18 points, making two 3-pointers and 8 of 12 free throws.