I bought that same Zips shirt and a Swensons one from Homage. Easily my two favorite shirts.
There was a "jumping" Zippy logo from the 80s so it would have to be before that. I've seen it on other old school apparel from different companies so my guess was used pre-70s too.
I think this is a defining moment for Coach JoeMo. It will show if coach values character and how he looks at a person's actions and how it might affect the position group and locker room. Akron now has a good running back room with youth and experience. To use a hillbilly quote:
"I would not touch him with a 10 foot pole"