Bigfoot can't strike. He's not Cain or even Carwin.
People act like any schmuck can go toe to toe with Lesnar and completely destroy him on the feet.
Ask Heath Herring and Randy Couture about that.
Hell, Bigfoot is slow enough and light hitting enough that Brock can actually have success there.
Carwin and Cain both had a track record of strong standup, Carwin especially for starching guys with one punch power. Cain obliterated Stonjic then flattened Nog.
Bigfoot has no advantages what so ever and gets stopped.