... Everything else at practice was dwarfed by the sight of defensive end Vance Walker crumpled on the grass, holding his right knee after the first play of the 9-on-7 period.
Walker got caught up in traffic on a run play and fell to the ground. A cart took him back to the locker room, and he was helped into the building by team medical personnel. He was unable to put any weight on his right leg as he was helped back to the training room.
The injury came at an inopportune time for Walker, who was having an outstanding training camp and had established himself as a first-teamer opposite Derek Wolfe. Walker was expected to undergo an MRI to determine the extent of the injury.
... Despite the injury, Kubiak was pleased with the general tenor and intensity of practice after Saturday's effort, which was desultory on offense and led to an extra walk-through period after practice.
"I thought offensively we practiced pretty good, especially the first hour and 20 minutes," Kubiak said. "We made a lot of big plays. We had a good competitive edge to us. It's something we've got to find all the time."
... Monday's intensity boiled over when Chris Harris Jr. and Emmanuel Sanders got into a scuffle. A physical duel between the two led to a flag during the play, and then a scuffle and shoving followed, with T.J. Ward, Bradley Roby and Darian Stewart all rushing over to the conflict.
"We've got to keep our composure," Kubiak said. "Guys are going to get upset and battle each other, but there are some things they won't let you do on the field, so they won't let you do them at practice, either."
... Trevor Siemian got the bulk of the first-team repetitions Monday and had the deep ball working well. After hitting Emmanuel Sanders up the right sideline past Aqib Talib in the one-on-one period, he did the same thing on the first play of the team period that came next.
Two plays after the deep shot to Sanders, Siemian showed his poise under pressure. He ran a playfake and quickly found himself under pressure from Derek Wolfe and Shane Ray. He side-stepped and faded back to create enough space to get to a seam, through which he could see Jordan Norwood downfield, finding him for a long completion.
Later, Siemian led the No. 1 offense on a successful drive against the second-team defense in the two-minute drill period. He hit three consecutive passes -- two to Cody Latimer and one to Demaryius Thomas -- for 58 yards to quickly move the offense from its 30-yard line to the defense's 12.
... QB Mark Sanchez guided the No. 2 offense to a field goal against the No. 1 defense during the two-minute period. Sanchez completed five of his nine attempts for 45 yards, including a 10-yard pass on third-and-3 from the offense's 37-yard line to keep the drive alive.
... QB Paxton Lynch was having an impressive drive with the No. 3 offense and had the unit in the red zone, but was intercepted by Will Parks, who made a quick read as Lynch rolled right and delivered a lunging interception just in front of intended receiver Andy Janovich. Two Lynch completions and a Devontae Booker scamper had set the offense up for the scoring opportunity prior to Parks' pick.
... WR Jordan Taylor was back to making acrobatic catches, leaping for a reception from Sanchez midway through practicer.
... Inside linebackers Brandon Marshall and Corey Nelson were particularly active against the run; both diagnosed gaps well and blew up handoffs during the team periods.
... Sanchez practiced holding on placekicks, but he did not work with kicker Brandon McManus. When Sanchez came out for a simulated hold on one kick, Von Miller playfully swung his foot.
... A group of Wounded Warriors watched practice and had the chance to meet with players and coaches after the two-hour session.
... Al King, the Broncos' public-relations director for most of the 1960s, watched practice.
Broncos Camp continues Monday as the Broncos focus on perfecting their technique. (Photos by Eric Bakke unless noted)
... NT Darius Kilgo returned after missing Saturday's work with a shoulder injury.
... FB Andy Janovich was back with the first team after leaving Saturday's practice because of some knee swelling.
... CB Taurean Nixon and S Ryan Murphy worked off to the side with one of the team's strength and conditioning coaches.
... WR Bennie Fowler and RG Ty Sambrailo remained sidelined with elbow injuries. OL Robert Myers Jr. and TE Garrett Graham also remained sidelined.
... TE John Phillips practiced for the first time since injuring his ankle during the July 30 practice. Phillips was limited to individual work as he continues to get up to speed.
... OT Russell Okung and OLB Von Miller saw extended action on Monday as they continue to be ramped up to full participation in practice.
... Talib saw some team-period repetitions Monday as he continues to be eased back to full-tilt work.
WEATHER REPORT:It was a warm, sunny morning at the UCHealth Training Center, with temperatures hovering between 81°F/27°C and 85°F/29°C.