IOWA CITY, Iowa — Kam Woods put the USC basketball team on his back during a stirring second-half comeback, but it wasn’t quite enough. Bennett Stirtz scored 20 points, including two free throws with 4.6 seconds remaining, as Iowa survived USC’s comeback bid to win, 73-72, on Wednesday night. Stirtz was fouled by USC’s Jerry Easter II and made both free throws to put Iowa back ahead. Woods scored 19 straight points for USC before Jacob Cofie made the go-ahead layup. USC led 28-27 at halftime, led by Chad Baker-Mazara who scored 11 of his 13 points in the first half.