MIAMI, FL - NOVEMBER 17: Kevin Garnett #21 of the Minnesota Timberwolves looks on during a game against the Miami Heat at American Airlines Arena on November 17, 2015 in Miami, Florida. (Photo by Mike Ehrmann/Getty Images)

Minnesota Timberwolves forward Kevin Garnett announced his retirement after 21 NBA seasons on Friday, leaving behind a legacy of ultimate intensity and defensive prowess.

Garnett brought down the curtain on his career via a farewell video on Instagram.

"I'm just thankful man, I can't ever ever put that into words," the 40-year-old said. "I'm just thankful to everybody and the love. I never would've thought that people would love me like this. For it to be a reality is just something else."

A 15-time All-Star, Garnett ranked 17th with 26,071 career points, ninth in career rebounds with 14,662 and 17th in blocked shots with 2,037.

Garnett spent his first 12 seasons in Minnesota, capturing the league's MVP in 2004, before joining the Boston Celtics where he cemented his status by winning an NBA championship in 2008.He spent a short stint with the Brooklyn Nets before returning to Minnesota in 2015 to finish his stellar career back where it all started.