Peterson suffered a hip pointer in Thursday morning's practice and was held out of the afternoon practice and Friday's first scrimmage, but that didn't stop him from yielding to fans and signing numerous autographs. During that time, he said there was some pain in the hip, but he's "just sore, just getting the muscles loose."
Second-year quarterback Tarvaris Jackson was also getting his muscles loose, but it appeared he used his legs almost as much as his right arm during the live portions of Friday's workout against the Chiefs.
Without Peterson, Chester Taylor and Troy Williamson in pads, Jackson at times struggled to find an open receiver and ended up scrambling for positive yardage several times.
"I just didn't want to hold the ball too long in the pocket because guys were coming," he said. "There are times they were playing certain defenses that it was on me to make a play."
Although there wasn't regular tackling to the ground, Jackson was scrambling early in the full-team portion. He connected on a short pass to fullback Tony Richardson, then scrambled on his second play. He found tight end Jim Kleinsasser on the next play, but it looked like a miscommunication with wide receiver Martin Nance brought down the Vikings' first offensive forge.
"They took care of the football and that's always key," Childress said.
All but quarterback Drew Henson anyway, who received a ribbing from Vikings fans when he threw two straight interceptions. He had previously fumbled the first snap he took.
Second-string quarterback Brooks Bollinger looked better early, hitting WR Bobby Wade, taking off for a sizable gain on a scramble, and then connecting with WRs Sidney Rice and Chandler Williams on consecutive passes.
During another full-team session for the offense, Jackson started a series with another scramble, then was sacked before finding Wade on about a 10-yard gain along the right sideline.
"I'm learning from my mistakes now instead of watching and learning (from others)," Jackson said. "I want to execute the offense the way (Brad Childress) wants it executed. We're going to keep it very vanilla.
"Just to come out here and read the coverages like it's going to be in the game, it's a lot different and it helps a lot."
It didn't start well for Jackson, who had a miscommunication with running back Mewelde Moore on the first snap of 9-on-7 work when the quarterback and running back ran into each other. On the next play, Moore went to bounce a run off right tackle and was blown back 5 yards by Kansas City safety Greg Wesley.
Moore ended up rebounding and found a few creases later in the passing game.
While the running game didn't start well early with no Peterson and no Taylor, it actually picked up when the second-team offense faced the Chiefs' second-team defense and Artose Pinner and Ciatrick Fason started to find some holes for rushes of about 5 yards.
The anticipated return of Peterson could add a whole new dimension.
"I'd like to see Peterson go tomorrow," Childress said. "He ran out here and we'll see how he gets up in the morning."
"They don't need a ton of this stuff, they just need to go when we ask them to go," Childress said of sitting the veterans who could have played.
Williamson had an infection and had some antibiotics taken through IV. He might play Saturday, Childress said.
WR Chandler Williams suffered a concussion and DE Khreem Smith was "hobbling around a little bit," Childress said. OL Dan Mozes was taken off the field on a cart with a knee injury.
"You're looking for guys to play the details of our defense. We make a defensive call and we're looking for precise technique, decisions, being true to their reads and so we get a lot out of it," Childress said. "Each of them has a responsibility."