Prefontaine had every American record from 2k through 10k at once, similar to Fisher. Fisher is a lot faster than Pre but has similar finishes at world events. However, look back not only to the shoes Pre had but the lifestyle. Pre was struggling for money. He was not on a big contract with a big, high quality team and able to go up for altitude stints. He also only had 24 years to reach his best. That's just two years out of college. He died through his own fault, but then maybe he wouldn't have been drinking so much with a big contract and support, no homelessness, etc.