Tim Duncan economics may have Danny Green all messed up, financially.

CBS Sports posted a tweet from the San Antonio Express-News' Dan McCarney, who quoted Green in response to giving the San Antonio Spurs a hometown discount by signing with the team, rather than hitting the free-agent trail and probably getting more money.

Green signed a four-year, $40 million deal to remain with the Spurs, the 2013-14 NBA champions, less than he would have received on the open market, according to CBS Sports.

Summer league coaching job grooming Becky Hammon to become first NBA head coach?

"... Green was expected to get a contract along the lines of what Khris Middleton, DeMarre Carroll and Wesley Matthews all received in their free agency negotiations," CBS Sports reported. "They all were signed to contracts that ranged from $14 million to $17.5 million per season on average. And yet, Green stuck with the team over individual mentality of the Spurs by sticking with them on a four-year, $40 million contract.

"It's accurate to assume he left money on the table to stick with the Spurs though. Middleton received five years, $70 million to stay with Milwaukee. Carroll signed for four years and $60 million to join Toronto. Matthews received four years and $70 million to go to Dallas, despite recovering from an Achilles' tendon injury last season. In terms of being a defender and a shooter, Green is on par with all of those guys."

Tim Duncan suing ex-financial adviser over $20 million in losses

Green, however, has been playing in the definitive team setting under Spurs coach Gregg Popovich and probably just looked across the practice floor at teammate and future NBA Hall of Famer Tim Duncan to gauge his own financial value.

Duncan averaged a $10 million salary his last two seasons with San Antonio. In fact, Green may feel a bit greedy based on Duncan's salary for the upcoming 2015 season, which will come in at $5.25 million, as reported by sportrac.com.

This is the same Tim Duncan who lost some $20 million in investments because of a shady financial adviser.