We have a fifth man in Machel Cedenio with a PR of 46.02, who would have run the semis to rest one of the other guys (Quow, Lendore or Lalonde), but as it stands the remaining 4 will have to run their liver string out to make the final, and if in the final, to medal. Their PBs all from this year are Gordon (44.52), Lendore (45.13), Solomon (45.31), and Cedenio (46.02).
In ONE race it is plausible for Cedenio to lead off in 46 or 45 high, Lendore and Solomon to split mid to high 44s, and Gordon to anchor in 44 flat or 43 high. On paper with clean exchanges, that can give us a 2:58 high to 2:59.
To do that twice is now a very tall order without Quow, and even a 2:59 is not assured a medal, even with a weakened US team (no Merritt).
There's the Bahamas sure to come out for redemption after not medalling with 3/2 guys in the semis/final, the US, The Belgians with the Borlee twins, Dominican Republic with Santos and Sanchez, UK, Russia, Poland, Kenya, and even Cuba and Venezuela - all capable of running right at 3:00 or under.
Maybe lightning will try twice for us and Lendore, Solomon or Cedenio would run above their form, as Gordon did.