In this video Castenada says that he broke the national record for 5k in the semi-final at the 1973 NCAA meet, running 13:24.
http://www.youtube.com/watch?v=V9rOONah2k0
Prefontaine then broke that record in the second semi, running 13:18. I think he just misspeaks and he's talking about the 3 mile.
These results show the final, where Pre beat Castenada 13:05 to 13:10.
http://usctrackandfield.com/results1973.pdf
I don't know if he's talking about the American record, the NCAA record, the NCAA meet record or something else.
Can anyone verify this story?