TAMPA, Fla. -

Stephen Morris threw for two touchdowns before limping off with an ankle injury and Duke Johnson scored a TD in his eighth consecutive game, helping No. 15 Miami roll past winless South Florida 49-21 on Saturday.

Miami (4-0) is off to its best start in nine years heading into next weekend's Atlantic Coast Conference opener at home against Georgia Tech. At 0-4 under first-year coach Willie Taggart, USF is off to the worst start in school history and has dropped 13 of 14 dating to last season.

Morris threw for 222 yards, moving ahead of Steve Walsh and into ninth place on Miami's career passing list. He tossed TD passes of 19 yards to Herb Waters and 34 yards to Stacy Coley as the Hurricanes scored on their first three possessions.