How many miles do "sprint-type" 800 runners like Jacob Hernandez, the Everett brothers, and Tyler Mulder run a week?

Is Hernandez really a sprinter? Not many sprinters run the mile.

Saw Tyler Mulder in an 8k cross country race last fall. So at least five!

Being Mulder's former teammate I can tell you that he does around 45-65 miles per week.

I am not familiar with these athletes so I will opine that they typically run in the neighborhood of 75 miles a week.

I am glad you just learned the word "opine" but you can't have an opinion on how many miles runs a week, you can have a guess. Not to mention that your guess is probably way off.

just another guy wrote:

I am not familiar with these athletes so I will opine that they typically run in the neighborhood of 75 miles a week.