Dirk Nowitzki’s new contract will give the Dallas forward a chance to spend 20 seasons with the only franchise he has ever played for.

The Mavericks and Nowitzki reached agreement on a two-year, $40 million contract, a person with knowledge of the deal told the Associated Press Tuesday on condition of anonymity because contracts can’t be signed until late Wednesday night Central time.

Nowitzki will have a player option in the second year.

The person also said the Mavericks agreed to a two-year, $6 million contract with free agent guard Seth Curry, the younger brother of two-time MVP Stephen Curry.

At $20 million per season, Nowitzki’s deal is a significant raise for the 38-year-old big man, who opted out of the final year of a three-year, $25 million deal that was a huge discount for the Mavericks. It helped them get Chandler Parsons in free agency two years ago, although he is leaving for a max deal in Memphis.

Lakers star Kobe Bryant was just the fifth player in NBA history to reach 20 seasons and he retired in April as the only one so far to do it all with one team. Tim Duncan of the Spurs is considering whether to return for a 20th season in San Antonio.

The 25-year-old Curry will be on his fifth team in four seasons. After playing sparingly for Memphis, Cleveland, and Phoenix his first three years, Curry averaged 6.8 points and 1.5 assists in 44 games for Sacramento last season.

West also joins Warriors

David West’s pursuit of that ever-elusive championship came up short in his lone season in San Antonio. Now the proud veteran is heading to Golden State to give it one more try.

West agreed to a one-year deal with the Warriors for the veteran’s minimum, a person with knowledge of the negotiations told the AP. It will be his 14th season in the league.

Less than 24 hours after Kevin Durant shook the NBA landscape with his decision to leave Oklahoma City for Golden State, West jumped at the chance to join him in the Bay Area.

West left some $11 million on the table last season when he opted out of his contract with Indiana to try to get a title with the Spurs.

He averaged a career-low 7.1 points per game and the Spurs lost to Durant’s Thunder in the Western Conference semifinals.

Jazz swap in Diaw

A person with knowledge of the deal said the Spurs traded Boris Diaw to the Jazz for point guard Olivier Hanlan. The 33-year-old Diaw, a key member of the Spurs’ 2014 championship team, averaged 6.4 points, 3.1 rebounds, and 2.3 assists last season . . . Center Roy Hibbert and point guard Ramon Sessions agreed to terms with the Hornets, a person with knowledge of the situation told the AP. Hibbert will receive one-year deal worth $5 million and Sessions will get a two-year deal worth $12.3 million with a team option for the second season. Hibbert gives the Hornets a replacement for Al Jefferson, who agreed to a three-year, $30 million deal with the Pacers. The 76ers agreed to terms with guard Gerald Henderson on a two-year deal worth $18 million.

Henderson, 28, averaged 8.7 points in his first season with Portland.

He spent the first six seasons of his career in Charlotte before being traded to the Trail Blazers, where he was a valuable two-way player that helped make them one of the surprising success stories of last season.