Adam Hunger / Reuters

Kevin Garnett shows off his Celtics jersey at a news conference in Boston on Tuesday.

The Timberwolves came within two wins of the NBA finals in 2004. Garnett averaged 24.2 points and a league-high 13.9 rebounds that season, joining Bird as the only players to average at least 20 points, 10 rebounds and five assists for five consecutive years.

But Minnesota has fired two coaches and not made the playoffs since. Garnett never said he was unhappy and never asked to be traded, but expressed frustration with some of McHale’s personnel decisions and challenged him to upgrade the roster.

Garnett was the fifth player drafted in 1995, coming out of Farragut Academy in Illinois and skipping college. He has averaged more than 20 points and 10 rebounds for each of the last nine seasons. He is among five players in NBA history with at least 19,000 points, 10,000 rebounds and 4,000 assists. The others are Wilt Chamberlain, Kareem Abdul-Jabbar, Karl Malone and Charles Barkley. He also is an outstanding defensive player and an excellent passer.

The Timberwolves had lost 60 games in each of the four seasons before Garnett arrived. But in his second season, he helped lead them to the first of eight straight playoff appearances.

Before his third season, Garnett got a six-year, $126 million extension in 1997.

With Garnett, seven-time All-Star Allen and five-time All-Star Pierce, the Celtics upgraded their profile in a sports market dominated by the New England Patriots and Boston Red Sox. Owners John Henry of the Red Sox and Robert Kraft of the Patriots and Boston Bruins executive vice president Charlie Jacobs all called to congratulate Celtics co-owner Wyc Grousbeck.

In his four full seasons as executive director of basketball operations, Ainge has stockpiled youngsters. He could be patient and let them develop or speed the process through trades for stars.

“We are delighted to have a core of three All-Star talents to anchor our team,” Grousbeck said.

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