Joe was NOT a highly regarded high school player when first recruited by Purdue . he blossomed his Senior year after Purdue already claimed him. they stole him before the blue bloods noticed him. And his recruiting ratings. before his senior year, he was not even on the charts.
from Wikipedia : Carroll, a 7'0"
center, attended Denver East High School, located in
Denver,
Colorado, where he was selected as an
All-American by Midwest Coach and Athlete Magazine. In his senior year, he averaged 20.3 points and 12.2 rebounds a game, while scoring 41 points in one contest.
Looking at HS stats, I've seen a lot more impressive ones. As for being a high school All American, you may be right. But Midwest Coach and Athlete magazine ? Those are hardly the big names in ranking high school athletes.