I've been enjoying this thread. As a hs teacher and asst. cross-country (x-country) coach, I gotta say I would place my money on the top 100 hs cross-country runners over this first ATP player. It comes down to specific training. Now if an ATP player trained for 6 weeks to 6 months, I'd take them to break into that top 100 but still not finish first. After all, you don't get to be an ATP player w/o a super competitive streak and a love of competition and winning.
Keep in mind that the top 100 runners in high school would have pr's in the lower 15s for courses that would be tougher than most road race courses. That's very fast!
Good job Jolly in stepping up to run. I'd love to be able to get out and run a fast time. It tough getting old and having nagging injuries which keep me from doing the things I love.
Back to using POGs. Why did I ever leave you dear friend?