Johnson had a 4-yard touchdown run in the second quarter and finished with 84 yards on 14 carries. Miami's defense also scored, with Shayon Green sacking Steven Bench and forcing a fumble that Jimmy Gaines recovered for the sixth defensive TD scored against USF in four games.
USF's offense has five touchdowns all season, including Marcus Shaw's 3-yard run that made it 7-7. Shaw wound up with 127 yards rushing, but the Bulls' offense didn't come close to scoring again until Bench their third starting quarterback in four weeks threw a 16-yard TD pass to Derrick Hopkins with two seconds remaining.
Bench was 13-of-27 passing for 189 yards. He was intercepted once and lost two fumbles.
Morris was limited in practice early in the week after being hit on his right ankle during Miami's 77-7 rout of Savannah State. He limped off the field early in the second quarter with the Hurricanes up 21-7 and did not return.
There was no immediate announcement on the severity of the injury, but he was walking on the sideline while backup Ryan Williams led the team in the second and third quarters.
Williams completed 8 of 14 passes for 153 yards and one TD before being replaced by redshirt freshman Gray Crow, who threw a fourth-quarter interception that defensive end Julius Forte returned 11 yards for USF's second touchdown.
Despite USF's struggles, Miami coach Al Golden entered the game wary of the Bulls coming off a bye week that gave them extra time to prepare for the Hurricanes.
Golden felt the first 15 plays of the game would be critical because USF figured to make some adjustments during the Bulls' open date, and it was incumbent upon Miami to respond to those changes quickly.
And that's exactly what Morris did against a defense that had been solid in USF's first three games. Miami moved 77 yards in seven plays to score after the opening kickoff and drove 91 and 83 yards to add TDs on their next two possessions after having two big plays on special teams wiped out by penalties.
Miami's Maurice Hagens was flagged for holding, wiping out what would have been a 101-yard kickoff return for Johnson. On the next change of possession, an illegal block call against Tracy Howard negated a long punt return by Phillip Dorsett. Undaunted, Morris responded each time by leading the Hurricanes down the field.
Miami gained 251 yards on its first three possessions, more than USF had ever allowed in a single quarter. It was 35-7 at the half and could have been worse.
Miami lost two fumbles inside the Bulls 5 and also missed a 23-yard field goal.
As he's been all season, Shaw was the bright spot for USF. He had his third 100-yard game for the Bulls, who sputtered offensively after Shaw's 44-yard run to the Miami 14 set up his second TD of the season.