Browns rookie quarterback Johnny Manziel isnít participating today in the teamís sixth practice of voluntary organized team activities, but itís not because heís heading to Las Vegas for more partying.



Manziel left Northeast Ohio to attend the 20th annual NFL Players Association Rookie Premiere in Los Angeles, a Browns spokesman said. The collective bargaining agreement stipulates that rookies who are invited to the premiere cannot practice with their team for the duration of the event, so Manziel obviously has the Browns' blessing to attend the orientation.



NFL Players Inc., the NFLPAís marketing and licensing branch, hosts the three-day, invitation-only gathering, which is designed to teach rookies the business of football. It features seminars on financial planning, brand building, group player rights and social-media practices.



Those who attend will also sign trading cards, get their faces scanned for the new Madden video game and wear their official Nike team uniforms during photo shoots with trading card companies Panini America and Topps at the Los Angeles Memorial Coliseum.



Manziel will actually be a late arrival to the premiere. It started Thursday and will run through Saturday.



Two other Browns rookies are participating, running back Terrance West and quarterback Connor Shaw. They attended the festivities Thursday and documented their presence on Twitter.




Representing #Cleveland at the 20th anniversary NFL #RookiePremiere @Terrancewest28 @NFLPlayersInc pic.twitter.com/5PrHIZN3um


ó Connor Shaw (@cmshaw9) May 30, 2014


Other notable rookies attending are Jacksonville Jaguars quarterback Blake Bortles, Minnesota Vikings quarterback Teddy Bridgewater, Houston Texans defensive end Jadeveon Clowney, Oakland Raiders linebacker Khalil Mack and Buffalo Bills wide receiver Sammy Watkins.



NFLPA Executive Director DeMaurice Smith and NFLPI President Keith Gordon will speak at the event. The list of featured guest speakers includes former NFL players Marshall Faulk, Willie McGinest, Torry Holt, Brandon Williams, Daunte Culpepper, Kevin Bentley, Jamaal Charles, Israel Idonije and Austin Pettis.