Will Muschamp has agreed in principle to accept the head-coaching job at South Carolina, a source told  Sports Illustrated. The deal is "all but done," the source told SI. Muschamp was one of several candidates to interview for the Gamecocks job this week in a search process that took an odd turn Saturday. Arizona athletic director Greg Byrne tweeted that his coach, Rich Rodriguez, had not committed to a South Carolina offer and would remain the Wildcats' coach. But sources close to the search process told ESPN.com's Chris Low that Muschamp had always been at or near the top of the Gamecocks' list. Muschamp interviewed with South Carolina officials earlier this week along with several others, including Oklahoma offensive coordinator Lincoln Riley and South Florida coach Willie Taggart. Muschamp, 44, is in his first season as Auburn's defensive coordinator. He was the Florida head coach for four seasons from 2011 to...