Pistons coach Lawrence Frank lauded the play of rookie point guard Brandon Knight and cited positives from his first season Thursday during a radio interview with Jim Rome. Knight, a first-round draft pick in 2011, averaged 12.8 points and 3.8 assists. He started 60 of 66 games and finished eighth in the rookie-of-the-year voting. Rome asked Frank whether he had concerns handing the offense to a player two years removed from high school. “It was all through merit,” Frank said.