Prior to his technical pro debut with the Dallas Mavericks, a Summer League clash in Las Vegas against Bronny James and the rest of the Los Angeles Lakers on Thursday, No. 1 pick Cooper Flagg made a surprising revelation.
The Mavericks' social media team quizzed the 6-foot-9 former Duke superstar with as many hard-hitting questions as they could fit in 32 seconds of content.
One of the most fascinating questions was the name of the most famous person's number Flagg possessed in his phone.
Get to know Coop in 32 seconds before his Summer League debut ⏲️@Cooper_Flagg // #MFFL pic.twitter.com/XFuy2tV90F
— Dallas Mavericks (@dallasmavs) July 10, 2025
Flagg, a Maine native and lifelong Boston Celtics fan, declared that six-time All-Star Celtics power forward Jayson Tatum was his most famous contact. Tatum, 27, is one of the league's best players, but could sit out most or all of the next season while recuperating from a torn Achilles tendon.
The 2024-25 Associated Press Rookie of the Year, a consensus All-American, had a dynamite one-and-done year for the Blue Devils. With Flagg leading the way, Duke posted a 35-4 record and made it all the way to the Final Four — although given the talent involved (three Duke players were selected in the top 10 of this year's draft), the fact that the Blue Devils didn't advance to the NCAA championship game may be a bit of a disappointment.
In 37 contests for Duke, Flagg averaged 19.2 points on .481/.385/.840 shooting splits, 7.5 rebounds, 4.2 assists, 1.4 blocks and 1.4 steals. He became the no-brainer top prospect in this summer's 2025 NBA draft pretty quickly, and now joins a mismatched Mavericks squad full of old, injury-prone future Hall of Famers in 33-year-old All-Star guard Kyrie Irving, 32-year-old All-Star power forward/center Anthony Davis, and 35-year-old former All-Star shooting guard Klay Thompson.
Now, Flagg is gearing up to make his technical NBA debut at the Thomas & Mack Center in Las Vegas. The action tips off at 7 p.m. CT, and will be broadcast live on ESPN.
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