The system is clearly broken,” said Tonya McClary, head of the Citizens Police Oversight Commission. City officials are seeking arbitration changes in negotiations with the police union.

Arbitration is a widely-used method for settling disputes between parties. During arbitration, parties submit their dispute to an impartial third person or party, usually chosen by the parties.

The Red Sox formally offered Duran $3.5 million last week when the sides couldn’t agree to terms; he countered at $4 million, marking a $500,000 difference. Friday’s deal provides a base salary at the ...