Best Ever NY Boys Performances Before Penn Relays Weekend

We're in that odd lull between the top-end performances that culminated the Indoor Championships, and the big Invitationals, both New York and Penn Relays, that really open up that Spring Season. That doesn't mean there hasn't traditionally been any competition during this "slow period." We went back and looked at what the top times ever ran during the month leading up to Penn Relays were, and the numbers are impressive. Can you break-in this April?

Note: Marks must have been achieved before the close of Penn Relays weekend, not including Penn marks.