The San Francisco Chronicle (Janny Hu) reportS: In the middle of a rocky rookie season, Anthony Randolph has fired agent B.J. Armstrong. “My people and I decided it was the best for me,” said Randolph, who spent time with his family in Dallas on the road trip. “B.J.’s a great agent, but we decided this was best.” Randolph filed the official paperwork last week and said he is in the process of selecting a new agent. Armstrong, an ex-NBA player, also represents No. 1 pick Derrick Rose.