Los Angeles Chargers rookie wide receiver Tre Harris is officially holding out from training camp.

According to NFL insider Ian Rapoport, the deadline for Chargers rookies to report to training camp was today, and Harris was not present. The second-round selection from Ole Miss is one of 30 second-round picks who remain unsigned due to disputes over guaranteed money in their contracts.

Houston Texans receiver Jayden Higgins signed a fully guaranteed contract in May, the first second-rounder to ever receive a fully guaranteed deal. The Cleveland Browns followed suit by signing linebacker Carson Schwesinger to a fully guaranteed contract.

The pair of contracts seemingly set a precedent that teams and players aren’t agreeing upon. Harris becomes the first second-round rookie to officially hold out.

The 55th overall pick, Harris posted 60 receptions for 1,030 yards and seven touchdowns in his fifth-year season at Ole Miss. He played his first three years at Louisiana Tech.