The Jets continued training camp Saturday, with their second practice. And once again, high-profile rookie quarterback Sam Darnold remained away, as his contract holdout continues.

But the issue with Darnold isn't offset language -- a common point of contention in rookie contracts. Instead, according to NFL Media, it is contract language involving Darnold's guaranteed pay and how and when the Jets could potentially void that money.

So that is what Darnold's agent, CAA Sports' Jimmy Sexton, is locked in a battle with the Jets over. According to NFL Media, Darnold will continue to skip camp practices until the issue is "handled," though it's unclear what that might mean, in terms of a negotiated settlement.

Darnold's four-year rookie contract is fully guaranteed. Its value is $30.247 million, including a $20.078 million signing bonus. It is very likely Darnold will get all of that money.

But most NFL contracts -- for veterans and rookies alike -- include language that lets a team void guaranteed pay if a player is arrested or suspended or gets in some kind of trouble.

The Jets traded up from sixth to third in the 2018 NFL Draft, in order to pick Darnold. They planned to give him every opportunity this summer to win their Week 1 starting quarterback job, in a battle with veterans Josh McCown (the incumbent starter) and Teddy Bridgewater.

But just McCown and Bridgewater were on the field Friday for the Jets' first training camp practice, as the organization and quarterback competition move forward without Darnold.

After Saturday's practice, the Jets will have just eight full practices -- including their Green and White scrimmage/practice, at Rutgers -- before their Aug. 10 preseason opener against the Falcons at MetLife Stadium. So the clock is ticking for Darnold and the Jets.

Darryl Slater may be reached at dslater@njadvancemedia.com. Follow him on Twitter @DarrylSlater. Find NJ.com Jets on Facebook.