How is Head an upgrade over Pruitt? Head barely played for Houston this year and then got cut. Either Head or Pruitt are most likely going to be on the inactive list when the playoffs start so what's the point? And it's very dangerous adding too many new players this late into the season. Both for chemistry reasons and because you have to take precious time out of practice to teach new guys plays that the rest of the team already knows.
As for Bryon Russell, the last 3 seasons he played (not including the 1 game in 05-06 season) he averaged 4.5, 4, 4.4 points on 35, 40 and 38% shooting. And he hasn't played in 3.5 years. So he was a bum in the late part of his career, hasn't played for a few years and now he is going to be good? No thanks.