The Rockets have re-signed center Dikembe Mutombo to a 1-year contract to back up Yao Ming again this season.  Mutombo did a good job last season for the Rockets when Yao went down with a broken leg.  Mutombo played in 75 games (33 starts) last season for the Rockets and he averaged 3.1 points, 6.5 rebounds, 0.2 assists and 1.0 block per game in 17.2 minutes.  He has now played in 1,148 games (899 starts) in his NBA career and he has averaged 10.1 points, 10.6 rebounds, 1.1 assists and 2.8 blocks per game.