Jayson Tatum

Boston Celtics star Jayson Tatum has agreed on a five-year, $314 million extension — the largest contract in NBA history — sources told ESPN’s Adrian Wojnarowski on Monday.

The deal includes a player option and trade kicker, sources said.

Boston Celtics star Jayson Tatum has agreed on a five-year, $314 million extension — the largest contract in NBA history — sources told ESPN’s Adrian Wojnarowski on Monday.

The deal includes a player option and trade kicker, sources said.