Assuming LeBron really was the GM:

1. He helped create the Miami Heat and their 4-year run.
2. The trade that got rid of Dion Waiters and brought in Shumpert and JR Smith and OKC’s 1st round pick helped Cleveland go to four straight Finals.
3. We know he wasn’t the GM during the negotiations to trade Kyrie Irving, because he never would have traded Kyrie Irving to Boston. They could have had Middleton, Brogdan and a #1 pick, if they did the Milwaukee deal, or Bledsoe, Bender and the #1 pick from Phoenix (Ayton, but could have been Doncic).