in the first round of the 2013 NFL Draft at Radio City Music Hall on April 25, 2013 in New York City.

An NFL team is under investigation for potentially violating the league's CBA

One NFL team could be in trouble for violating the CBA.

The Jacksonville Jaguars are under investigation by the NFLPA for possibly violating the league's collective bargaining agreement, according to The Florida Times-Union.

New Jaguars executive vice president of football operations Tom Coughlin sent out a letter to several players asking them to appear in Jacksonville to undergo physicals. The NFLPA is investigating whether or not that is a violation of the CBA.

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The NFL's CBA maintains that players are not required to participate in any offseason workout prior to April 10, though they can work out on their own.

So the players are free to return to Jacksonville for the physical, but they are not required to do so. Teams can technically ask players to return for physicals before April 10, but it's essentially an unwritten rule that teams shouldn't ask them to do that during the offseason.

If the NFLPA decides the Jaguars and Coughlin violated the CBA, they could potentially lose one of their 10 organized team activities during the offseason. Those 10 organized activities are a part of phase three of the NFL's offseason workout schedule, and it's the only phase where players are allowed to wear helmets.

The violation doesn't seem too serious, but the Jaguars could face at least a small punishment for asking players to return early.

(h/t ESPN)