Boston Celtics sign undrafted third-year forward Sam Hauser to a four-year, $45 million extension

The Boston Celtics' busy offseason continues, as the recent NBA champions sign backup forward Sam Hauser to a four-year, $45 million extension, per ESPN's Adrian Wojnarowski.

Hauser, who went undrafted out of Virginia before joining the Celtics in 2021, shot 42.4% on three-pointers this season on 465 attempts, making him one of the most accurate three-point shooters in the league. The 26-year-old forward played nearly every regular season game and started in 13 game this season.

Hauser is entering his fourth year in the NBA. Under the new contract, he will stay in Boston through the 2028-2029 season, and will make around $11 million per year under the new deal.

Hauser's contract certainly doesn't break records, but does push the Boston Celtics' payroll further over the luxury tax. The Celtics are set to have one of the most expensive payrolls in NBA history: Per Wojnarowski, Boston has a projected $225 million payroll next season, with an additional $210 million luxury tax penalty.

The Celtics have kept busy this offseason, signing Jayson Tatum to a record-breaking $315 million contract on July 1 and signing pivotal guard Derrick White to a $126 million extension the same day. Boston will use their newly re-signed core to try and shoot for a back-to-back championship next season.