Would it be a bad sign for the Dallas Cowboys if things were already breaking down on Day 1 of training camp?Actually, that didn't happen with Dallas' sideline headphones at the Wednesday, July 29, practice, but coach Brian Schottenheimer and defensive coordinator Christian Parker let linebacker DeMarvino Overshown think that's what was happening.Call it a test, and the Texas alum passed. Safety PJ Locke also did well on tests of a more serious nature, as his knee injury doesn't seem to be that bad. And Texas alum Jaydon Blue is off to a quick start in the battle for RB2.Here is what Dallas is up to. DeMarvion Overshown passes key test for CowboysDallas' first choice to wear the "green dot," typically a middle linebacker equipped with a headset so he can hear the coaches, is Texas alum Overshown and Schottenheimer said he passed his first test.Schottenheimer revealed during a Thursday, July 30, news conference that he and Parker pretended the headsets were malfunctioning to see how Overshown would do. He did just fine."D-Mo got to the exact call that he was supposed to, which is what you expect," Scottenheimer said. "D-Mo was outstanding getting us lined up into the call that we wanted to be in."More: Could one of the Dallas Cowboys best players be changing position?Dallas Cowboys RB Jaydon Blue off to a hot startOne of the storylines for the Dallas Cowboys offense in training camp is the battle for backup running back behind Pro Bowl incumbent Javonte Williams, and by all accounts, Blue, a second-year back out of the University of Texas, got a hot start in the battle on Wednesday, July 29, during the first day of training camp.A play after his main competition for the RB2 job, Phil Mafah, was stripped for a fumble by new addition Rashan Gary, Blue busted a 45-yard touchdown run as he showed off his speed.Brian Schottenheimer said PJ Locke suffered hyperextended knee in practice and will sit today. Schottenheimer doesnt believe it is anything significant. Todd Archer (@toddarcher) July 30, 2026Dallas Cowboys safety PJ Locke injured at training campDallas' first training camp casualty certainly could have been worse, as safety PJ Locke's hyperextended knee, suffered Wednesday in a non-contact situation, is not expected to be serious.Per coach Brian Schottenheimer, as reported by ESPN's Todd Archer, Locke was held out of Thursday's practice but was expected back soon. Locke, signed as a free agent from Denver in the offseason, is expected to be Dallas' top backup in their three-safety system.Schottenheimer said that the "tests looked great" on Locke's knee.More: Madden 27 rookie rankings are out. Is anyone better than Caleb Downs?Dallas Cowboys need DaRon Bland to stay healthyThe Cowboys' secondary was awful in 2025, and a big key to fixing that is for cornerback DaRon Bland to stay healthy and on the field. He has dealt with foot injuries each of the past two seasons and had surgery in January that limited him in minicamp.He now says he's 100% and is hoping to show that in training camp."I feel pretty good, real good actually," Bland told DallasCowboys.com. "I feel, right now, way better than I was the first time I had the surgery. So it feels really good right now to be back."We're full go. Full go. It's limited reps, but full go."More: Dallas Cowboys trade rumors: Which Cowboy could be on the block?Bland also noticed something when camp started. After all the offseason moves, Bland is now the veteran of the room as he enters his fifth NFL season, all with the Cowboys."It definitely came quick," Bland said. "I'm only in year five, but it feels good to be known as a guy that some of the guys can come to because of all my experience."How to get Dallas Cowboys tickets for 2026 NFL seasonSeat Geek is the official partnerof the Dallas Cowboys, so this is where to get official tickets. The Cowboys are also offering packages for theWeek 3 game in Rio de Janeiroagainst the Ravens, ranging from $1,200 to $5,750. That doesn't include airfare and the cheap rate doesn't include a hotel.Other places to buy tickets, which will be more expensive but with a much larger selection than the official tickets, includeStubHub,TicketMaster andVivid Seats. Those sites also offer tickets for away games.Bret Bloomquist can be reached, bbloomquist@elpasotimes.com; @Bretbloomquist on X.This article originally appeared on El Paso Times: Pop quiz! Dallas Cowboys LB passes surprise test at training camp