Ratcliffe of Concord Mass. Who ran 4:06 mile indoors solo and an indoor 1600m 4:02 (I believe) DMR split is racing in the pro mile.
He's had a slow outdoors season ran at Penn Relays 4:04 1600, ran 4:10 at his league champs solo, as well as a 9:03 at divisionals solo. This kid doesn't get a run for his money often.
Last year a bunch of pros went sub 4, and it looks like he is trying to take an attempt at sub 4 as well. Definitely close to it, perhaps even capable.
I would not be surprised if he did, but then again would not be surprised if he just runs a 4:06.