Felton, 34, averaged 6.9 points and 2.5 assists last season backing up Russell Westbrook after inking a one-year deal with OKC in July 2017.
Perhaps most encouraging was that Felton, a career 32.9 percent three-point shooter, drilled 35.2 percent of his long-range looks.
According to Second Spectrum player-tracking data, Felton converted 39.4 percent of his catch-and-shoot threes—a number that was key considering OKC's second unit was otherwise shaky from an efficiency standpoint.
According to ESPN.com's Bobby Marks, re-signing Felton will push the Thunder's luxury-tax bill above $150 million. As things stand, OKC is on pace to become the first team in league history to tout $300 million in combined financial commitments between salaried players and tax payments.