The injury to the left knee of fifth-year senior receiver Davon Johnson turned out to be worse than expected.

Johnson, who had played in all 10 games and had 21 catches for 348 yards — a team best 16.6-yards-per-catch — will miss what’s left of the season and will undergo season-ending surgery according to the injury report released by the team Thursday.

Johnson was injured during practice Tuesday. He becomes the third scholarship receiver at UM (5-5) to go down to a season-ending injury. UM, which hosts USF on Saturday at 3 p.m., will be without four scholarship receivers against the Bulls (3-6) as sophomore Rashawn Scott remains suspended indefinitely.

The good news for UM? USF ranks 102nd out of 120 FBS teams in pass-efficiency defense.

“They like to play a lot of Cover 4, Cover 8, man up,” said sophomore receiver Phillip Dorsett, who is expected to be one of just four scholarship receivers around to play for UM Saturday. “They’re a physical defense. Secondary can run a little bit. I know [former Monsignor Pace standout] Kayvon Webster. I went to middle school with him. It’s going to be a challenge like every week."

• Safety Deon Bush (shoulder) will miss his second game in a row.