We're now hours away from the Oakland Raiders preseason opener against the Detroit Lions and there have still been no rumblings on the Khalil Mack front. The holdout for the star pass-rusher will now carry into the start of the preseason and the future outlook remains bleak.

There hasn't been much revealed on contract negotiations (at least on the positive side,) but on Friday Michael Lombardi offered the only updated info we've had on talks recently. Per the NFL analyst, Mack is seeking $22 million per year, which would be around $3 million more in annual salary than Denver Broncos star Von Miller earns.

Miller has consistently been a baseline for Mack's contract talks, as his deal reset the market at the time and Mack is now expected to do so once again. After the Broncos star received a six-year, $114.5 million deal with $70 million in total guarantees, per Spotrac, the question becomes how far off the Raiders and Mack could be.

It was fully expected that Mack would receive a deal slightly larger than Miller's, and the Raiders certainly knew that going in. So are Reggie McKenzie and company offering something more in the range of $20-$21 million per year? Or, could they be looking at a deal more in line with what Miller has at $19 million? Regardless, it seems the two sides still aren't close and the $22 million number is obviously a big hold up.

This past week during Raiders camp, NFL.com's Ian Rapoport dropped a stunner, stating that the Raiders and Mack's camp haven't had contract talks since February. He also revealed that there was no offer on the table at that current time.

Whether or not that's changed is unknown at this point, but with the team set to begin preseason play on Friday, the holdout from Mack is getting more and more concerning. It's resulted in potential trade talks coming out, although the Raiders have not made the 2016 Defensive Player of the Year available, per Bleacher Report's Mike Freeman.

The Oakland Raiders have completed offseason practices, OTAs and minicamp and are gearing up for Jon Gruden's first season back on the sidelines! Want the latest news sent straight to your inbox? – Sign up for our FREE Raiders newsletter now!

Each day Mack is away from the team also makes his return tougher. After all, the Raiders have almost an entirely new coaching staff, and Mack will need to learn a new defensive scheme under coordinator Paul Guenther. Just for good measure, the team also has over 40 new players who weren't with the team at the end of last season, so it'll be an adjustment for the star.

We'll keep you updated on any news that comes out on Mack's contract negotiations.