Del Rio, a junior, relieved redshirt freshman Feleipe Franks in the second half last weekend against Kentucky, leading the Gators to a 28-27 comeback victory.
Earlier, Davis put the Gators ahead for good at 24-17 with a 1-yard scoring run with 6:56 left in the third quarter.
His average of 81.5 receiving yards per game is third in the SEC behind Ole Miss receivers A.J. Brown (98.8) and DaMarkus Lodge (89.0).
Del Rio was scheduled to undergo surgery on Monday, handing the job back to redshirt freshman Feleipe Franks, who started the first three games before being benched in the second half of a win over Kentucky on September 23.
Franks entered the game for UF's final first-half series and energized a quiet crowd by completing a 49-yard pass to receiver Tyrie Cleveland.
The game turned out to be quite a battle from there.
Freshman Malik Davis (26 carries, 195 yards) leads Florida in rushing. No one else on the team has a reception of longer than 34 yards on the year and only two players have caught passes longer than 30 yards. When the 4 quarter started, Troy increased their score with another touchdown and bonus point but the Tigers didn't come alive until there was about 7:14 left in the quarter and fell just short by the end of it thanks in part to an interception.
The Gators will also likely lean on a running game that flourished Saturday when freshman Malik Davis ran for 124 yards and two touchdowns.
"He's obviously been a guy on the deep stuff", McElwain said. Florida's next top three receivers have combined for 283 yards. "This was a game of attrition". A right shoulder injury ended his year prematurely, and he had surgery for both shoulders in the off-season.
The son of Oakland Raiders coach Jack Del Rio, Luke Del Rio started six games last season.
"I've got to get what there is to be had in terms of the information, present the facts, make sure that these guys understand the difference between ideal self and real self, and real self is 59-to-zip". "It hurts. I know it hurts him and it also hurts me".