The NFLPA is investigating the Jaguars for a violation of the collective bargaining agreement in relation to a letter executive vice president Tom Coughlin sent to several players under contract.

The letter said they were required to return to Jacksonville for a physical examination during the middle part of this month.

The Jaguars’ players aren’t allowed to report to the team’s facility until April 10 and multiple league sources said the team’s request isn’t allowed.

A source said the union was notified of Coughlin’s letter by an agent of a player who doesn’t live in Jacksonville and balked at paying his own travel expenses back to town.

A second league source said several players were advised by their agents to go through the physical even as the NFLPA began its inquiry. The sources requested anonymity because they weren’t allowed to speak publicly about the issue.

A potential punishment for the Jaguars could be forfeiting an organized team activity (OTA) workout this spring.

Teams are occasionally stripped of OTAs because of "excessive contact," during a session the previous year – Seattle and Atlanta will have fewer than the allowed 10 this spring and the Seahawks were also docked their fifth-round draft pick.

This is the second item the NFLPA is looking into regarding the Jaguars since Coughlin’s hiring in January. Former defensive end Jared Odrick filed a $5.5 million grievance against the team earlier this month saying he is owed money that was guaranteed for injury.