Widely recognized as perhaps the greatest power forward in league history, "The Big Fundamental" was a winner in every sense of the word. The Spurs never finished with fewer than 50 victories for a full season with him in tow.
Five championships, two MVPs, thee Finals MVPs, and 15 All-Star appearances later, and Duncan has the resume to easily send him to Springfield as a Basketball Hall of Famer when the time comes.
Here's a look at some of the more memorable moments Duncan has provided the basketball world over the years:
Duncan gets drafted first overall
San Antonio hit the proverbial jackpot when it won the 1997 NBA Draft Lottery, swooping in to take the top selection with just the third-highest odds.
Taking Duncan was an absolute no-brainer, as he was a two-time ACC Player of the Year, three-time NABC Defensive Player of the Year, and National College Player of the Year at Wake Forest. The rest is history.
Duncan drops 53 points on the Dallas Mavericks (26/12/2001)
Surprisingly enough, Duncan only scored 50-or-more points on one occasion, with the Dallas Mavericks incurring his wrath nearly 15 years ago at the old Alamodome.
In a 126-123 overtime loss, Duncan scored 53 points on 19-of-28 shooting from the field and a perfect 15-of-15 from the charity stripe in 50 minutes of action. He also added 11 rebounds, four assists, and three blocked shots.
Duncan captures first MVP award (2002)
Four seasons after taking home NBA Rookie of the Year honors, Duncan upgraded in the hardware department by winning Most Valuable Player for the 2001-02 regular season.
San Antonio finished with a 58-24 record with Duncan leading the way, averaging 25.5 points on 50.8 percent shooting, 12.7 rebounds, 3.7 assists, and 2.5 rejections.
Duncan clinches second title with near quadruple-double (15/06/2003)
There's closing out a series to win an NBA championship, and then there's closing out a series the way Duncan did against the New Jersey Nets.
Duncan barely missed out on the ultra-rare quadruple-double with a line of 21 points, 20 rebounds, 10 assists, and eight blocked shots en route to being named Finals MVP for the second time.
Duncan nearly beats the Los Angeles Lakers (13/05/2004)
Had it not been for the heroics of one Derek Fisher, this off-balanced jumper over an outstretched Shaquille O'Neal may have been the defining bucket of Duncan's career.
The Los Angeles Lakers stole the win as a result of Fisher's miraculous shot, eventually taking the Western Conference semifinals in six games
Duncan tastes bad Gatorade
Duncan wore his emotions on his sleeve at appropriate times, but when it came to this bottle of blue Gatorade, there was no holding in his disdain for the beverage.
It took two sips, but Duncan eventually realized the drink just wasn't up to par.
Duncan is given the boot ... from the bench (15/04/2007)
Former NBA referee Joey Crawford wasn't going to allow himself to be showed up by Duncan, who was visibly laughing on the sidelines because of Crawford's questionable officiating.
Duncan was whistled for two technical fouls in a matter of minutes, sending him to the locker room with an automatic ejection. Crawford didn't get away scot-free, though, as he was suspended indefinitely by the league after Duncan accused him of challenging him to a fight.
Duncan records a 20-20 game at 37 years old (2/12/2013)
Age was just a number for Duncan on this eventful December night, as he became the oldest player ever to score 20-or-more points and snag 20-or-more boards in a single game.
The Atlanta Hawks had no answer for the 6-foot-11 big man, who punctuated his 23-point, 21-rebound performance with a jumper coming off a pin-down screen to give the Spurs a narrow 102-100 win.
Duncan gives Patty Mills the worst handshake ever (19/02/2016)
This routine was either elaborately planned by Duncan and Mills, or the two were just not on their A-game.
They should have just gone back to the basics and kept it as simple as possible.
Duncan finishes career in Oklahoma City (12/05/2016)
In what will now be remembered as the final time NBA fans would ever see him on the hardwood, Duncan put forth his strongest outing of the 2015-16 postseason with 19 points and five rebounds in 34 minutes in Game 6 of the Western Conference semifinals.
Unfortunately for Spurs supporters, the team wound up falling by 14 points to the Oklahoma City Thunder, sending the team home relatively early after a franchise-best 67-win campaign.