Sam Hauser agrees to four-year, $45 million extension with Celtics, AP source says

The Boston Celtics locked up another member of their championship core on Sunday, agreeing to a four-year, $45 million extension with Sam Hauser, a person with knowledge of the details said. Hauser's 197 3-pointers were second on the Celtics behind only Jayson Tatum, and now he has...