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Jaylen Brown during his visit to Spain.

Watch Jaylen Brown nail a soccer shot during his visit to Spain June 23, 2017 | 11:38 AM

Jayson Tatum with NBA Commissioner Adam Silver on draft night.

What NBA experts said about the Celtics drafting Jayson Tatum June 23, 2017 | 11:34 AM

Paul George passes the ball away from Boston's Marcus Smart, center right.

Should the Celtics trade for free-agent-to-be Paul George? June 23, 2017 | 11:30 AM

Isaiah Thomas ESPN Body Issue. Isaiah Thomas is photographed by photographer Walter Iooss at the Charlestown Club, in Charlestown MA, on April 9, 2017.

Isaiah Thomas to appear on cover of ESPN's 'Body Issue' June 23, 2017 | 10:54 AM

FILE - In this March 17, 2017, file photo, Kansas's Josh Jackson (11) goes up for a shot over UC Davis's Garrison Goode (44), Brynton Lemar (0) and Mikey Henn (24) in the first half of a first-round game in the men's NCAA college basketball tournament in Tulsa, Okla. Jackson spent one season at Kansas and is expected to be a top-five pick in Thursday's NBA draft. (AP Photo/Tony Gutierrez, File)

Josh Jackson canceled workout while Danny Ainge was flying to Sacramento June 23, 2017 | 10:31 AM

Southern Methodist forward Semi Ojeleye (33) celebrates during a first-round game against Southern California in the NCAA tournament in Tulsa, Okla., Friday, March 17, 2017.

Celtics draft SMU's Semi Ojeleye at No. 37 overall June 22, 2017 | 11:28 PM

Duke's Jayson Tatum answers questions during an interview after being selected by the Celtics as the third pick overall during the 2017 NBA draft, Thursday, June 22, 2017, in New York.

4 ways Jayson Tatum can help the Celtics right away June 22, 2017 | 10:43 PM

Jayson Tatum dunks against the Troy Trojans during the first round of the 2017 NCAA Men's Basketball Tournament.

Watch Jayson Tatum's best highlights from his Duke career June 22, 2017 | 9:37 PM

Jayson Tatum dunking in armor.

Watch Celtics' lottery pick dunk while wearing 65 pounds of armor June 22, 2017 | 9:13 PM

Duke's Jayson Tatum poses for photos with NBA Commissioner Adam Silver.

Jayson Tatum excited to 'meet the best fans in the world' in Boston June 22, 2017 | 9:03 PM

Jayson Tatum of Duke battles for a rebound in the second half against South Carolina during the second round of the 2017 NCAA Tournament at Bon Secours Wellness Arena on March 19, 2017 in Greenville, South Carolina.

Celtics select Jayson Tatum with No. 3 pick in draft June 22, 2017 | 8:01 PM

Markelle Fultz winds-up to dunk.

76ers draft Markelle Fultz with No. 1 pick acquired from Celtics June 22, 2017 | 7:40 PM

NEW YORK, NY - JUNE 22: Potential first round draft picks pose on stage before the first round of the 2017 NBA Draft at Barclays Center on June 22, 2017 in New York City. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Mike Stobe/Getty Images)

NBA Draft updates: Celtics pick Jayson Tatum at No. 3 June 22, 2017 | 6:04 PM

NBA Commissioner Adam Silver, left, poses for a photo with Jaylen Brown after Brown was selected third overall by the Boston Celtics during the NBA basketball draft, Thursday, June 23, 2016, in New York. (AP Photo/Frank Franklin II)

Here's how people reacted the last time the Celtics used their No. 3 pick June 22, 2017 | 4:38 PM

FILE - In this Feb. 11, 2017, file photo, Florida State's Jonathan Isaac (1) drives during the second half of an NCAA college basketball game against Notre Dame, in South Bend, Ind. The top forwards in Thursday’s NBA draft needed only a season in college to secure their position in the lottery. Kansas’ Josh Jackson and Duke’s Jayson Tatum are one-and-done small forwards with size and athleticism, while Florida State’s Jonathan Isaac and Arizona’s Lauri Markkanen headline the crop of power forwards or stretch-4s with the potential to play inside or out. (AP Photo/Robert Franklin, File)

Here's why some draft experts think the Celtics will pick Florida State's Jonathan Isaac June 22, 2017 | 4:27 PM

Celtics president of basketball operations Danny Ainge.

What will the Celtics do with the No. 3 pick? June 22, 2017 | 12:41 PM

Josh Jackson averaged 16.3 points last season.

Why the Celtics should draft Josh Jackson June 22, 2017 | 11:08 AM

FILE - In this June 7, 2017, file photo, University of California Los Angeles guard Lonzo Ball takes questions from the media after a closed Los Angeles Lakes pre-draft workout in El Segundo, Calif. By now the entire basketball world knows Lonzo Ball is a singular talent with a unique parent. (AP Photo/Damian Dovarganes, File)

Why the Celtics should hope the Lakers pass on Lonzo Ball June 22, 2017 | 10:58 AM

GREENVILLE, SC - MARCH 19: Jayson Tatum #0 of the Duke Blue Devils battles for a rebound in the second half against the South Carolina Gamecocks during the second round of the 2017 NCAA Men's Basketball Tournament at Bon Secours Wellness Arena on March 19, 2017 in Greenville, South Carolina. (Photo by Kevin C. Cox/Getty Images)

Why the Celtics should draft Jayson Tatum June 22, 2017 | 6:09 AM

FILE - In this March 19, 2017, file photo, Duke's Jayson Tatum, left, drives past South Carolina's Chris Silva during the first half in a second-round game of the NCAA men's college basketball tournament, in Greenville, S.C. Tatum spent one season at Duke and is expected to be a top-five pick in Thursday's NBA draft. (AP Photo/Rainier Ehrhardt, File)

Who's No. 3? NBA draft intrigue begins after Fultz, Ball June 22, 2017 | 2:28 AM

SALT LAKE CITY, UT - MAY 6: Gordon Hayward #20 of the Utah Jazz reacts to his late game three point basket during their 102-91 loss to the Golden State Warriors in Game Three of the Western Conference Semifinals during the 2017 NBA Playoffs at Vivint Smart Home Arena on May 6, 2017 in Salt Lake City, Utah. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Gene Sweeney Jr/Getty Images)

Danny Ainge's son hopes Gordon Hayward stays in Utah June 21, 2017 | 3:15 PM

NEW YORK, NY - MARCH 29: Kristaps Porzingis #6 of the New York Knicks grabs the rebound as Hassan Whiteside #21 of the Miami Heat defends at Madison Square Garden on March 29, 2017 in New York City. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this Photograph, user is consenting to the terms and conditions of the Getty Images License Agreement (Photo by Elsa/Getty Images)

Here's a realistic package the Celtics could send the Knicks for Kristaps Porzingis June 21, 2017 | 12:50 PM

Knicks forward Kristaps Porzingis (6) swoops in to reject a layup attempt by Celtics guard Avery Bradley.

How much should the Celtics give up for Kristaps Porzingis? June 21, 2017 | 12:21 PM

05/26/2017 Waltham Ma- Boston Celtics player Isaiah Thomas (cq) talks about his season while being interviewed in Waltham. Boston Globe StaffPhotograph Jonathan Wiggs Reporter:Topic

Isaiah Thomas is inciting NBA free agency rumors on social media again June 21, 2017 | 10:34 AM

FILE - In this March 17, 2017, file photo, Kansas's Josh Jackson (11) goes up for a shot over UC Davis's Garrison Goode (44), Brynton Lemar (0) and Mikey Henn (24) in the first half of a first-round game in the men's NCAA college basketball tournament in Tulsa, Okla. Jackson spent one season at Kansas and is expected to be a top-five pick in Thursday's NBA draft. (AP Photo/Tony Gutierrez, File)

Josh Jackson reportedly won't work out for the Celtics unless they commit to pick him June 21, 2017 | 8:47 AM

Indiana Pacers' Paul George in 2017.

Celtics rumor roundup: Paul George trade talk got 'serious,' then 'stalled' June 21, 2017 | 7:09 AM

GREENVILLE, SC - MARCH 19: Jayson Tatum #0 of the Duke Blue Devils dribbles the ball against Maik Kotsar #21 of the South Carolina Gamecocks in the first half during the second round of the 2017 NCAA Men's Basketball Tournament at Bon Secours Wellness Arena on March 19, 2017 in Greenville, South Carolina. (Photo by Kevin C. Cox/Getty Images)

Jayson Tatum worked out for the Celtics Monday June 20, 2017 | 9:17 AM

Boston Celtics general manager Danny Ainge.

Here's a list of the Celtics' future 1st-round draft picks June 20, 2017 | 8:45 AM

The 1985-86 championship starters: Danny Ainge, Larry Bird, Dennis Johnson, Kevin McHale, and Robert Parish.

Trading the No. 1 pick once netted the Celtics two Hall of Famers June 20, 2017 | 8:39 AM

Josh Jackson averaged 16.3 points last season.

Josh Jackson's coach thinks he's a mix of Kawhi Leonard and Paul George June 20, 2017 | 12:00 AM