Daniels had his best game last week against Pittsburgh, making seven catches for 86 yards. He has 25 catches for 375 yards on the season.
"He was making really good progress, learning how to play the position," Kelly said.
Senior John Goodman replaced Daniels after the injury -- which was suffered while trying to come up with a pass in the end zone -- and promptly hauled in an 18-yard touchdown pass from Everett Golson.
In other injury news, cornerback KeiVarae Russell's head injury "cleared up nicely," according to Kelly, who expects him to be ready to practice on Tuesday.