Chris Bosh occasionally expressed his frustrations last season as his role changed, but he enters 13-14 prepared to contribute in every area.

"It's always a tough thing to continually redefine yourself and redefine your role," Bosh said. "Sometimes, it's frustrating but the finished product has been winning a championship. It's all worth it when it's said and done."

Unlike LeBron James and Dwyane Wade, Bosh is often asked to produce in a different way each night depending on the opponent.

Bosh is the prime example of Erik Spoelstra's position-less basketball.

Spoelstra said Bosh's responsibilities will "continually evolve" this season. Bosh can go from inside presence to mid-range shooter to 3-point specialist in a span of a week.

"It doesn't stop," Spoelstra said. "As soon as he gets comfortable, we add other wrinkles because of his versatility. We want to constantly keep him just a little bit out of his comfort zone … He picks up things very quickly that allows us to add more things offensively."