Well they were in Indianapolis. I hope they had a professional consultation with Ronnie Jones, Director of Sports Performance for Colts.
I was diagnosed with plantar fascitis once and put in boot; it seems like a common diagnosis based on no empirical date just patient report of symptoms and it being first thing they tried. I was almost crippled in boot which resulting actual tests being done determining actual cause and scheduled for surgery. I hope they do tests before a boot.