Photos of Browns RB Duke Johnson & WR Vince Mayle at the NFLPA Rookie Premiere

The NFLPA Rookie Premiere began on Thursday and will last through Sunday. As we reported, two members of the Cleveland Browns were invited to participate in the event this year: RB Duke Johnson and WR Vince Mayle. Both rookies were busy signing trading cards in Los Angeles today and getting a crash course on the life of marketing yourself as a professional athlete. Check how some of the photos below:

RB Duke Johnson

Here is @DukeJohnson_8 signing Inception autos. #nflparookiepremiere pic.twitter.com/TIUMohEfRM

— Topps Company (@toppscards) May 28, 2015

.@DukeJohnson_8 all checked in for the @NFLPA #RookiePremiere singing for @PaniniAmerica pic.twitter.com/Kl7z5XUjHu

— Paradigm Sports Mgmt (@ParadigmSM) May 28, 2015

Hmmm . . . these look interesting. @DukeJohnson_8 @TyMontgomery2 #WhoDoYouCollect #NFLPARookiePremiere pic.twitter.com/OOKutcCeA1

— Panini America (@PaniniAmerica) May 27, 2015

WR Vince Mayle

@Vince_Mayle Keep your eyes open for these bad boys! #NFLPARookiePremiere pic.twitter.com/nyNkf1o8PR

— OYO Sports (@OyoSports) May 28, 2015

.@vince_mayle checking out @Uber at #NFLPARookiePremiere pic.twitter.com/KGdZ5NjURt

— NFL Players Inc. (@NFLPlayersInc) May 28, 2015

#NFLPARookiePremiere trading card signings underway w #Packers @TyMontgomery2 and #Browns @Vince_Mayle pic.twitter.com/UFlo1HGvLY

— NFLPA (@NFLPA) May 28, 2015

"Going against Joe Haden in practice." -@Vince_Mayle https://t.co/1vQwU36yKo

— Topps Company (@toppscards) May 28, 2015