What some of the NBA's biggest stars looked like when Tim Duncan won his first NBA title

The San Antonio Spurs announced on Monday that Tim Duncan is retiring, ending one of the most prolific careers in NBA history.

In 19 seasons, Duncan won two MVP awards and five NBA championships, and he won his final championship 15 years after his first. In fact, it has been so long since Duncan won his first title that most of today's biggest NBA stars were either in grade school or high school at the time. 

Below we take a look at where those other stars were in their lives in 1999.