1. David Robinson - David Robinson was only 5'9 during his junior year of high school but remarkably grew a staggering 15" in just a short space of time and was almost 7'1 by the time he was in college.
2. Scottie Pippen - It's usually rare for most people to grow after high school. Scottie Pippen beat the odds by growing from 6'1 to 6'8 after high school.
3. Dennis Rodman - Dennis Rodman stood at only 5'6 in high school. At age 19, he experienced an unbelievable growth spurt that propelled him from 5'6 to 6'8.
4. Tim Duncan - Before he turned 17, Tim Duncan stood at 6'3 which, though not short, wouldn't be considered tall by NBA standards. At age 17, Duncan had a massive late growth spurt which saw him reach a towering 6'11.
5. Anthony Davis - Between his sophomore and senior years in high school, Anthony Davis grew from 6′2 to 6′10. He went from a lightly-recruited guard to one of the best high school players in the country.
6. Dwight Howard - It's hard to believe that Dwight Howard stood at just 5'8 when he was 15 years. From the age of 15 to 16 years, Howard grew more than a foot. He went from 5'8 to 6'9 in just one year before finally reaching his adult height of 6'11.
7. Russell Westbrook - Russell Westbrook was only 5'8 as a freshman in high school despite having over-sized hands and size 14 feet. Before his senior year, Westbrook had a growth spurt that saw him grow from 5'10 to 6'3.
8. CJ McCollum - As a freshman at GlenOak High School, CJ McCollum stood at a mere 5'2. However, he benefited from a late growth spurt which saw him gain 9 inches by the start of his junior year before finally reaching his adult height of 6'3.
9. Manu Ginobili - Manu Ginobili had a massive late growth spurt in his late teens. He went from 5'8" to 6'6" when he was a senior in high school. He grew almost 10 inches in just 2 years.
10. Lamar Odom - At 6'2 in high school, it seems as though Lamar Odom was destined to be a point guard. Out of the blue, Odom experienced a late growth spurt that saw him grow from 6'2" as a high school senior to 6'9" his junior year of college.
11. Dennis Johnson - Dennis Johnson went from 5'9" as a high school senior to 6'4" in one year after graduation.
12. Lebron James - LeBron James was told by a doctor when he was 11 that he would only grow to be 6'3. James was able to beat the odds by growing from 6′1 to 6′8 in just two years.
13. Zion Williamson - Zion Williamson grew six inches between eighth and ninth grade, and another four inches the following year, sprouting from a stocky 5'9" to a manly 6'7".
14. Markelle Fultz - Markelle Fultz had a great freshman season good enough to get him a trial on varsity going to his sophomore year but at 5’9” he was cut from the varsity team. By the start of Fultz’s junior season, he experienced a crazy growth spurt that saw him reach 6’3”.
15. Marcus Camby - Camby was a point guard until junior year of high school then hit a growth spurt that got him to 6'11".