Phoenix Suns star Devin Booker reportedly signed the richest contract extension in NBA history in terms of annual average value with a new two-year, $145 million deal.

Devin Booker just signed a contract extension with the Phoenix Suns worth $145 million, and it's a historic one.

The Phoenix Suns rewarded their franchise player with a massive contract extension on Wednesday. Per ESPN's Shams Charania, Booker agreed to a two-year, $145 million extension with the Suns. The deal is the highest annual extension salary in NBA history.