The window to negotiate with impending free agents opened at 11 a.m. Monday, and it took less than five minutes for the Raiders to make Trent Brown the highest-paid offensive lineman in NFL history.

Although the new league year starts officially at 3 p.m. Wednesday, many more monster deals will be agreed to over the next 48 hours, and we're tracking the biggest of them right here:

Antonio Brown saga over after Raiders agree to acquire, pay Steelers All Pro

Hub Arkush: Only a few 'expensive' free agents Bears should consider (subscribers only)

Raiders keep going big, will sign Trent Brown to record OL deal

Bears' free-agent fits at RB, TE, OLB, DB and PK (subscribers only)

Eagles wisely continue bolstering trenches, adding Jackson and re-signing Peters

Kwon Alexander strikes gold with San Francisco 49ers

Washington inexplicably gives Landon Collins $45 million GTD as part of record pact

Jaguars tab Nick Foles to replace Blake Bortles, turn page from disastrous 2018

Hub Arkush: Buster Skrine looks like good fit with Bears; Mike Davis a wait and see (subscribers only)

Rival Packers will poach starting S Adrian Amos from Bears

Greg Gabriel: Scouting soon-to-be Bears Skrine, Davis (subscribers only)

Jets borrowing from playbook of clubs that have built successfully around rookie QBs

Hub Arkush: Free agency is fun but no way to win a championship

Green Bay Packers enter a new era in free-agency spending

FA winners? How about the host of gems mined on Day 3 of 2015 NFL draft

Jets make free agency's biggest gamble by signing Le'Veon Bell

Hub Arkush: Cordarrelle Patterson's not a running back but he is a difference maker (subscribers only)

Cleveland Browns become Super Bowl contenders after OBJ heist; Giants a total disaster

After mass FA exodus, Ravens start adding with signing of Earl Thomas to replace Eric Weddle

Win-win? 49ers find closer in Ford and keep draft options wide open but miss on Bell

Salt please: Reserve OG-C Ted Larsen returns for second Bears stint on 1-year deal

Hub Arkush: Browns, Jets, Raiders and Packers moved market, guaranteeing them nothing