San Antonio Spurs guard Alvin Robertson, deadlocked with club management over a new contract, will seek the help of Mayor Henry Cisneros as an arbitrator to end the dispute, Robertson's agent said Wednesday.

Robertson, a three-time All-Star made $400,000 while averaging 19.6 points last season, but wants a new six-year contract that would net him about $1 million per season, his agent Tom Selakovich said.Spurs management, however, has offered only $600,000 with subsequent increases, Selakovich said.

Robertson said he was committed to staying in San Antonio, but that could change.