The National Football League Players Association filed its annual financial report with the U.S. Department of Labor on May 29 and the document shows that the powerful professional sports union has paid big money over the past year to lawyers from five leading Am Law 100 firms.

The Am Law Daily reported last month on the NFLPA turning to Winston & Strawn, the union’s primary outside counsel through its sports law group co-chair Jeffrey Kessler, to defend embattled New England Patriots quarterback Tom Brady in his appeal of a controversial four-game suspension handed down by the league for playing with underinflated footballs during a January playoff game.