Surprise! The San Antonio Spurs are going to retire Tim Duncan's number.

The team announced Wednesday that Duncan — a future first-ballot Hall of Famer who retired in July after 19 seasons and five championships — will be honored on Dec. 18 with a special postgame ceremony after the Spurs take on the New Orleans Pelicans.

Duncan will become the eighth player in franchise history to have his number raised up to the AT&T Center rafters, joining Bruce Bowen, George Gervin, Sean Elliot, Avery Johnson, Johnny Moore, James Silas, and David Robinson.

Here's why you should care:

- In addition to the five championships, two NBA MVP Awards and three NBA Finals MVPs, Duncan led the Spurs to a 1,072-438 regular season record, the best in NBA history over 19 seasons.

- He's the only player in NBA history to start — and win — an NBA championship in three separate decades.

- He finished his career with 15 All-NBA Team (tied for most all-time) and 15 All-Defensive Team (most all-time) honors.

- Not only was he the third player in NBA history to reach 1,000 career wins, he was the first player to reach 1,000 wins with one team.

- He's the Spurs' all-time leader in total regular season points (26,496), rebounds (15,091), blocks (3,020), minutes (47,368) and games played (1,392).