ENGLEWOOD — A behind-the-scenes look at Broncos training camp practice Tuesday with observations and analysis from The Denver Gazette.

Play of the day

Tensions rose to their highest point of training camp with a fight between the first-team offense and first-team defense. Quarterback Bo Nix threw an interception during a team period when linemen initiated a scrum. Nix tried to pull outside linebacker Nik Bonitto off the pile. Both players were held back by teammates as the action intensified. It was possibly the most heated moment in Broncos training camp since Sean Payton took over as head coach.

Position battle

Tight end: It was a rough practice for rookie tight end Justin Joly. He instigated a short-lived fight. He got blown up by inside linebacker Taurean York after catching a pass in the flat. He also dropped a pass from quarterback Sam Ehlinger. The Broncos have several young tight ends battling to make the roster.

Stock rising

OL Gavin Ortega: The undrafted rookie offensive lineman played with the first-team offense after Calvin Throckmorton — the fourth-string center — left with an apparent injury following the practice skirmish. Ortega is getting increased opportunities after injuries to centers Luke Wattenberg, Alex Forsyth and Michael Deiter.

Stock falling

Two-minute offense: Practice concluded with a two-minute drill with the starters and backups. Both units failed to secure a first down. It’s been a common theme. A talented Broncos defense is making it difficult for the offense to move the football under pressure.

Attendance check

The following Broncos did not practice Tuesday: linebacker Drew Sanders, wide receiver Michael Bandy and Forsyth. Wide receiver Jaylen Waddle appeared to be a full participant.

Wide receiver Marvin Mims and Wattenberg participated in team stretches before working on the side field for the majority of practice.

Injury report

Throckmorton was seen with blood on his head when he left practice after the brief team fight. Throckmorton did not return. Offensive lineman Nick Gargiulo is on the physically unable-to-perform list with a torn ACL.

What’s next

Training camp continues with practice at 10 a.m. Wednesday at Broncos Park. The next preseason game is 7 p.m. Friday against the Packers at Empower Field.

Ticket information

Free mobile tickets required for entry to open practices are sold out. Fans can return their tickets by emailing tickets@broncos.nfl.net up to 30 minutes after the start of practice each day. Refunded tickets will be made available to the general public through Ticketmaster on a day-to-day basis. Attendance is limited to about 1,000 people.