Four players scored in double figures Thursday night and No. 14 Memphis expanded its American Athletic Conference lead to two games with an 80-65 win over South Florida in Tampa.Dain Dainja scored a game-high 20 points for the Tigers (21-4, 11-1 AAC), which overcame unusually poor shooting to win their eighth straight game. Memphis made only 40.3 percent of its field goals and missed 13 of its 30 free throws but made up for it with dominant rebounding and good defense.The Tigers earned a 51-34 advantage on the boards, getting 16 offensive rebounds that led to 16 points, and limited the Bulls (12-13, 5-7) to 38.3 percent shooting from the field. They also got 18 points from PJ Haggerty, 15 from Tyrese Hunter and 10 from Colby Rogers.Jayden Reid, Kobe Knox and Brandon Stroud each scored 11 points for South Florida, while Jamille Reynolds added 10 points and eight rebounds before fouling out with 4:36 remaining. The Bulls also ran into turnover trouble, committing 15 that Memphis cashed in for 20 points.The Tigers led by as many as 24 points in the second half and never looked back.