Joseph Randle did not take part in Friday's practice but he worked through rehab and conditioning. Darren McFadden and Lance Dunbar split the first-team snaps as the Cowboys worked mostly against a scout-team defense in their two-hour practice.
"How he looks like he is injury-wise, he'll play, if that's the issue," Jones said of Randle. "And he should play because he's in the rotation."
Coach Jason Garrett said Randle is "day to day" after aggravating an oblique strain that kept him out of the Cowboys' first preseason game last week against the San Diego Chargers. McFadden missed the first 11 practices of training camp with a hamstring strain but has taken part in the last six since coming off the physically unable to perform list.
"Now I don't want to imply that he's going to play a lot because I don't want to imply anybody's going to play a lot," Jones said. "But you'll see him up there. You'll see him take some snaps."
Like McFadden, Dunbar has practiced without any issues since Saturday after he was slowed due to an ankle sprain earlier in camp.
While Garrett has not laid out a decree on who will play and how much against the 49ers, Dunbar expects to play.
"You get an opportunity to play football again, who would want to pass that up?" Dunbar said. "I've been out here. I wasn't able to play last game, so I'm looking forward to being out there."
Linebacker Sean Lee, who took team snaps for the first time in three practices, said he was not sure if he would make his preseason debut Sunday. Tight end Gavin Escobar said he needed to pass a few more tests for his concussion before he could be cleared to play, but he worked in team drills Friday and reported no problems.
Linebacker Anthony Hitchens will miss his second straight game with a sprained right foot. He expects to be in a walking boot for a few more days but hopes to start on-field rehab next week.
"I'm just trying to get the mental reps, still watching film with the guys, just trying to get better in a different way not being out there on the field," Hitchens said.
Rookie Byron Jones said he hopes to get back on the practice field next week after receiving positive news regarding the second opinion on his left shoulder. Jones was hurt in a collision Sunday with Morris Claiborne.
Cornerback Rod Sweeting, claimed off waivers Thursday from the Buffalo Bills, is expected to arrive later Friday. Cornerback Corey White was not at practice for the second straight day but Garrett said White, who has been tending to family business, is expected back soon.