Derek Young nailed a 3-pointer with 20 seconds left in regulation and hit two clutch free throws in overtime to help Spalding (12-10, 3-4) overcome a 14-point first-half deficit and upset McDonough (16-5, 5-3), 57-51, in overtime last night. "It's the biggest win of the season for us, no question," Spalding head coach Mike Glick said. "Down 14 on the road, to come back and win was a test of our character. This could turn our season in a different direction." With Spalding up two and 10 seconds left in the overtime period, Young hit two free throws to make it a four-point cushion. The senior scored 20 points on the night and Danny Quinn added 18 points and 10 rebounds. Kevon Moore scored 13 for Spalding. "We're starting to jell and play much more unselfish basketball," Glick said. Spalding (12-10) 4 16 11 17 9 - 57 McDonough (16-5) 12 13 4 19 3 - 51 Spalding (57) Young 5(3) 7-8 20; Quinn 8 2-4 18; Bald 0 2-2 2; Moore 4(2) 3-4 13; Davis 1 2-2 4. TOTALS: 17(5) 16-22 57. McDonough (51) Summers 7 5-8 19; Herbert 5(3) 0-0 13; Yermal 3(1) 1-2 8; Sheppard 1 3-4 5; Ventura 0 1-2 1; Gavinfort 2 0-0 4. TOTALS: 19(4) 9-14 51.