The Phoenix Suns have secured star guard Devin Booker on a two-year, $145 million maximum extension that will keep him with the franchise through the 2029-30 season. At $72.5 million per year, the accord sets a National Basketball Association record for average annual salary on an extension, topping the $71.3 million benchmark established last week by Oklahoma City’s Shai Gilgeous-Alexander. Booker and Suns owner Mat Ishbia finalized the agreement during a meeting in Las Vegas on Wednesday night, according to the player’s representatives at CAA. When added to the three seasons remaining on his current pact, the new deal brings the 28-year-old’s total guaranteed money with Phoenix to roughly $316 million over the next five years. Drafted 13th overall in 2015, Booker has spent his entire ten-season career in Phoenix, becoming the franchise’s all-time leading scorer and a four-time All-Star. He averaged 25.6 points and a career-best 7.1 assists last season despite the Suns’ failure to reach the playoffs. The record extension underscores the club’s plan to rebuild around Booker after an offseason overhaul that included a front-office shake-up and the trade of Kevin Durant. Ishbia has signaled that the guard will remain the cornerstone as Phoenix seeks to return to title contention.