The Dallas Mavericks waived center Samuel Dalembert, forward Brandon Ashley, guard Tu Holloway and forward Jamil Wilson.Dalembert, who recently sustained an injury to his left leg, averaged 4.5 points and 4.5 rebounds in 12.8 minutes over four preseason games.In seven preseason games, Ashley averaged 1.1 points and 2.6 rebounds in 12.1 minutes.Wilson, who also appeared in all seven preseason contests, averaged 2.4 points and 1.6 rebounds in 17.5 minutes.Holloway did not play for Dallas in the preseason after signing on Thursday.