Celtics' Kemba Walker could be biggest postseason X-factor as Boston finally looks like team we expected | CBS Sports Headlines Celtics' Kemba Walker could be biggest postseason X-factor as Boston finally looks like team we expected In many ways, as Walker goes, so go the Celtics ESN FeedsThis post was … Continue reading Celtics' Kemba Walker could be biggest postseason X-factor as Boston finally looks like team we expected