LeBron James showed up to training camp in the best shape of his career.

He's getting to practices early; he's staying late; and his most popular flaw, his jumper, never has looked better after a summer of diligent work.

"LeBron is at the center of everything we do," Cavs' coach Mike Brown said. "No one on the team works harder than him, and it sets a great example for the other guys."

Last year, James' energy level was inconsistent in the first half of the season, probably a result of a summer of heavy play with Team USA. James' national team obligations were significantly less this summer, and he spent extra time working on his game no matter where he was in the country.

That has James feeling perhaps more confident than ever about his game.

"This could be my best season," James said simply after Friday night's preseason game against the Seattle SuperSonics.