Cavaliers coach Tyronn Lue said the difference was a change in defensive intensity after Cleveland's early struggles gave the Grizzlies a lead that reached 13 in the first quarter.
James records triple-double as Cavs defeat Grizzlies 112-89 →
"It's not an old team anymore," Lue said. "We've definitely gotten younger."
Wizards hold off LeBron, new-look Cavaliers 110-103 →