He has had a plantar problem that he got after pushing too hard in his training as it was going too well.
Full explanation from Chris in Insagram Post below
There may be just a handful of men with the Olympic qualifying standard prior to the 2020 Olympic Trials and Ben Rosario said he thought the Trials race would be won in 2:13. So that means that likely the only American who might be capable of running sub 2:11:30 on the difficult course is Galen Rupp.
Making it more imperative that USATF change it's Olympic qualifying procedures and go off World rankings at the least and try and get a waiver form IAAF to be able to pick the top 3.