The evidence is mounting, and yet people seem reluctant to acknowledge it: The greater the pressure, the worse James does. This Miami team is doing worse than James's teams in Cleveland, even though their talent level is higher. His numbers are either flat or slightly off, depending on which statistic you look at, but nothing -- nothing -- is better. His inability to make a game-winning shot is well documented. His Cavalier teams were upset in the playoffs by a lower seed in each of the last two years, and when he basically disappeared at the end of last summer's Boston series, my guess is that it wasn't because of a sex scandal or because he had decided to leave, but because he couldn't handle the expectations of the later rounds. His success in the last Olympics was because he was second fiddle to Bryant and the team was so loaded that it really didn't matter whether he played well or not.
It was not always this way. As recently as the 2007 playoffs, James scored his team's last 25 points to secure a double-overtime win against the Pistons in Detroit. But as James has gotten older, his heart has shrunk. It's becoming more difficult to believe that he has what it takes to lead a team to a championship, although I don't doubt that he could be an excellent second option.
At some point, the Heat are going to have to say, listen, LeBron, you're great, but you aren't clutch. Accept it and move on. If you want to win, you're going to have to accept a role with less pressure.