On Sunday, in his first playoff game for Cleveland since 2010, James will take his first step toward an NBA championship — toward the one that could top them all.Since that defeat by Boston in 2010, James has won two titles in Miami, and he's hoping to quench a 51-year championship drought in a city that didn't take long to re-embrace him.Cleveland and Boston split the season series, with the Celtics winning twice last week — games in which Cleveland head coach David Blatt rested starters to be fresh for the postseason.Since James and Love came to town, Cleveland has been tagged as the team to beat.