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Brown joins biggest active contracts in MLB, NFL, NBA, NHL

Jaylen Brown is now under the richest contract in the NBA, putting him among elite company in basketball ... and beyond.

Boston Celtics fans had been awaiting the terms of an extension for Brown all offseason, and his new deal locks him in with Boston for as many as five more years -- though the contract does have a trade kicker.

Brown's deal, while big, is still more than $100 million short of the active "Big Four" American sports record -- an honor held by the Los Angeles Angels' Mike Trout. Here's how the contract stacks up with others throughout sports.