It's been a while since the Dallas Cowboys sat at the top of the National Football League.And even though they haven't been the best team in the league this season by any means, they still have a legit shot at having the best record once it's all said and done, or at least clinch their division even before the final week of the season.That's why they just can't leave anything to chance at this point and must do whatever it takes to stay healthy and focused.Cowboys Want To Prevent An OutbreakSo, with assistant special teams coordinator Matt Daniels and defensive tackles Osa Odighizuwa and Trysten Hill testing positive for COVID-19, the Cowboys are reportedly going the extra mile to prevent a big outbreak in the locker room:"We're just trying to do everything we possibly can to lower the risk and keep our guys safe," coach Mike McCarthy told the team's official website.McCarthy himself was forced to be sidelined for a couple of week with the virus, as well as star wideout Amari Cooper.Jerry Jones Advocates For VaccinationAt the beginning of the season, Cowboys owner Jerry Jones urged his players to get the vaccine, stating that they had to look at the bigger picture.Now, his efforts could pay off as they're one of the few teams without a big outbreak right now:“To me, this is a team game," the owner said on 105.3 The Fan, per USA Today."We rely on each other to play. We rely on each other to win. We have to have each other. There’s 11 guys out there at any one time to be trite about it. You have to count on the other guy being available, and you certainly don’t want to be doing anything that causes your teammates to not be available. All of that comes to the same conclusion as far as what you agreed to be as far as a player, be part of a team. You check ‘I’ at the door, so to speak. All of those has an answer."Cowboys' Defense Is Leading The WayThe Cowboys can't afford to lose any soldiers at this point in the season, especially after just getting DeMarcus Lawrence back.Sitting at a 10-4 record, they're riding a three-game winning streak and hold a three-game lead over the Philadelphia Eagles for the top of the NFC East.They currently have two players in the top-5 of the Defensive Player of the Year candidates in Trevon Diggs and Micah Parsons, and their defense continues to put them in a position to succeed.Dak Prescott Knows The Offense Needs To Be BetterEven so, the Cowboys' offense has been pedestrian as of late, which is why Dak Prescott said that they need to catch up with their elite defense if they want to be a legit contender:“We’re trying to peak at the right time, make sure we’re heading into the postseason with momentum, playing some of our best ball,” Prescott said, per ProFootballTalk."Our defense is doing that. Our offense still has some growth to do. Our expectations, our standards are way up there. So we’re going to keep pushing it until we get there. And then push past that.”The Cowboys have enough offensive talent to put these struggles behind them but they need to step up right now.