Gaffney, like a number of young players, is trying to crave out a role in the NBA. His strengths–defense and rebounding– would be welcome additions to most teams, but while the Celtics certainly value those traits they are also loaded at his position where he was already behind Kevin Garnett  and Glen Davis .
The C’s feel like they need shooting and that has left Von Wafer  with a fighting chance at the last roster spot. Wafer is getting pushed by Mario West, a defensive specialist who walked on at Georgia Tech and survived three seasons with the Hawks. West has played 156 career games and scored 132 points, so scoring is definitely not his thing.
But West can guard small forwards and that is a greater source of need for the Celtics than what Gaffney was able to provide.