Hill's had a hammy issue for most of the year. He will be on the field when healthy.
Info below from Matt Maiocco at the Santa Rosa Press Democrat
With Taylor Jacobs gone and Bryan Gilmore back, is Ashley Lelie the No. 3 receiver? Nolan said Lelie is the No. 2 split end and Gilmore is the No. 2 flanker, until Jason Hill gets healthy. Gilmore said he expects to be the No. 3, resuming the role he had a year ago.
"Bryan Gilmore gives us versatility at all the spots," Nolan said. "When we go to three wide he gives us the same thing."
Gilmore worked out for the Raiders on Monday. He was on his way home, going through airport screening, when he got a call informing him to remain in the Bay Area. The 49ers wanted him back.
I think the team will push Hill into the No. 3 spot when he's healthy enough to return to action. Hill sustained a hamstring strain the Thursday before the Pittsburgh game.
"Right now he'll be a limited practice player, so we'll see where he's at," Nolan said.
When asked which receiver will fill the role of No. 3 this week, Nolan said he'd rather not say.