I've seen a couple of posts on here asking for advice regarding parking on gamedays, so I thought I'd post Ohio State's official "2022 Season Day-of-Game Football Parking Map".
As you can see in the map legend, green and red lots/garages are available to the general public, while the blue lots/garages around St. John Arena are available to those with an ADA placard. All official lots/garages only take credit cards for payment.
If you would like to download a high-res version of this map, click this link.
If you want my personal recommendation, I always park in 9th Ave. East Garage (the green one at the bottom of the map), as it usually doesn't fill up as quickly as some of the other lots/garages, and it gives me much quicker access to 315 after the game than most of the other locations. Another good choice is Arps Garage (in green due east of the stadium), as it similarly is a moderate walk with quick access to 71 once the game is over.