Here is the issue behind Jets' Sam Darnold holdout in training camp

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…