PHOENIX — The Father’s Day video posted Sunday stretched nearly nine minutes, and it was awesome. Phoenix Suns star Devin Booker walked with his dad in the Flagstaff High School gymnasium toward a rack where seven jerseys hung. All revealed Booker’s new jersey number — 15.Melvin Booker appeared touched. He had worn 15 during his college days at Missouri, where he was an All-American guard as a senior. “I don’t even know what to say, son,” Melvin Booker said in the video. Booker told him that he had always considered his dad the blueprint for basketball success.“A new chapter, to honor you, everything that you’ve done for me, I’m excited about it,” Booker said, adding that he felt like he was about to start the second half of his career.New York celebrates the 2026 NBA champion New York KnicksDr. J wore 6 for all 11 of his NBA years with the Philadelphia 76ers. Larry Bird will forever be 33 in Boston green. Reggie Miller and 31 are linked in Indiana, as are Dirk Nowitzki and 41 in Dallas and Tim Duncan and 21 in San Antonio. But times change.Booker, 29, wore No. 1 in college at Kentucky and for his first 11 seasons with the Suns. At Mortgage Matchup Center in downtown Phoenix, his jersey was always the dominant fashion choice for fans young and old. It showed how much respect they have for Booker, who has expressed a desire to spend his entire career in the desert. A number change won’t alter that affection.But that wasn’t the most interesting part of Sunday’s announcement video. It was those first three words — a new chapter.The Suns last season were a nice story, rebuilding and making the playoffs in coach Jordan Ott’s first year. But the main storyline since their dismissal — a quick four games against the Oklahoma City Thunder — has focused on Booker and his disappointing postseason performance. No one really knows how to explain it.Just a few seasons earlier, Booker had been the best 2-guard in the league, a terror in the playoffs who had finished fourth in 2022 MVP voting. Since then, he has changed — still a star, but different. Always wanting to make the right play, Booker passed up shots in the playoffs, trying to set up teammates when the Suns needed his scoring.