DALLAS (AP) — Dirk Nowitzki has signed his contract with Dallas, and a person with knowledge of the deal says it's worth more than the original agreement. The 38-year-old star who has spent all 18 of his seasons with the Mavericks signed a two-year, $50 million contract on Wednesday — $10 million more than the deal struck before contracts could be signed.Read more on NewsOK.com