Lionel Messi needs little introduction: he'll go down in history as one of the best to ever play soccer, with six Ballons d'Ors to his name, countless individual awards and team trophies in his cabinet and all of them earned while playing for Barcelona. And yet, this summer he has a very real choice. After trying to leave Barca last summer -- remember we all learned the word burofax? -- he'll be able to walk out the door for free this summer once his contract expires on June 30.