LMA is a runner. His JOB is to get out on the break. He has Greg or Joel for rebounding. Brandon also rebounds. Nate has said in interviews from the past that he likes to get Aldridge out to beat the other teams bigs down the floor.
I have to chuckle, we are either the worst or one of the worst fast breaking teams in the league, so you describe him as a "runner" on a team that does not run? Especially the first unit woth Roy and Blake - huh?