BRADENTON, Fla. — The Major League Baseball Players Association filed a grievance against the Miami Marlins, Oakland Athletics, Pittsburgh Pirates and Tampa Bay Rays, accusing the teams of failing to appropriately spend revenue-sharing money.

Union spokesman Chris Dahl, speaking Tuesday at the union’s training camp for free agents, said the grievance was filed Friday. Union head Tony Clark declined to comment.

“We have received the complaint and believe it has no merit,” Major League Baseball said in a statement.

If the case is not settled, it would proceed to a hearing before Mark Irvings, baseball’s independent arbitrator. The grievance was first reported by the Tampa Bay Times.

Miami was 20th in payroll last year for its 40-man roster, according to MLB’s final figures. Pittsburgh was 25th, Tampa Bay 27th and Oakland 28th.

Pittsburgh traded star outfielder Andrew McCutchen and ace Gerrit Cole during the offseason. Pirates President Frank Coonelly called the grievance “patently baseless” and said the team spent revenue-sharing money consistent with the rules in baseball’s labor contract.

“Our revenue-sharing receipts have decreased for seven consecutive seasons while our major league payroll has more than doubled over this same period,” Coonelly said in a statement. “Our revenue-sharing receipts are now just a fraction of what we spend on major league payroll. We also have made significant investments in scouting, signing amateur players, our player development system and our baseball facilities.”

Baseball’s collective bargaining agreement states “each club shall use its revenue-sharing receipts ... in an effort to improve its performance on the field” and prohibits use of that money to service debt related to franchise acquisition and service to debt not related to improving on-field performance.

The players’ association expressed concern about the Marlins and the revenue-sharing provision a decade ago. The Marlins denied any violations.