Walker embracing new role with Heat

MIAMI -- Antoine Walker understands his new role, and he's readyto embrace it with the Miami Heat.

Throughout most of his first nine seasons, a tenure spent largelywith the Boston Celtics, Walker was a marquee guy, someone who teamsbuilt offenses around. That won't be the case in Miami, not withShaquille O'Neal and Dwyane Wade starring as one of the NBA's elite 1-2 punches.

Yet this was where Walker wanted to be -- not because he wants torelax, but because he wants a title.

"In past years, I've always come in and had to worry about scoring20, 25 a night for my team to win," Walker said Thursday at hisunveiling in Miami. "Now I don't have to worry about …