Lebron was an all-state WR in high school and was heavily recruited by Florida State, Ohio State, and Notre Dame among others. He had football scholarship offers in the 10th grade and was projected to be a 5 star recruit if he would have kept playing football until his senior year. He stopped playing football after the 10th grade because he was so good at basketball he knew he would be the #1 pick in the NBA. I'm pretty sure if he put on the football pads tomorrow he would be a pro-bowl TE. Jimmy Graham didn't play a day of college football and is the best TE in the league. Lebron would be able to transition and be great at it right away.
BTW. To all you Lebron haters that call yourself Miami Dolphins fans.... Don't forget you root for "Miami" so expect to be ridiculed when you bash Lebron. You bash him, you are bashing citizens and fans of Miami sports. So take your hate somewhere else.