TROY, Ala. — Ken Williams had 18 points, including the clinching free throws with one second remaining and South Alabama edged Troy 76-71 on Saturday night. The Jaguars (11-12, 4-6 Sun Belt), took the lead for good on a 3-pointer by Shaq Calhoun that made it 68-66 and started an 8-0 run. The Trojans got