I think Ogbo would have been working out under the Rams direction based on this: "Players who start the preseason on the PUP list may not practice until cleared by team medical personnel. They can attend team meetings and work out." [
www.si.com]
His injury was a broken foot so I assume he could do everything upper body and some leg work (extensions and curls for the entire time, maybe squats or presses for the last few weeks). Probably cardio, too. My guess is he's in shape and is now getting into football shape.
As a pass rusher he can rely on his talent and maybe learning the intricacies of the defense isn't as necessary as fo some other positions. (Line up here, go get the QB probably sinks in the first day ...) If that's true we should see Ogbo sooner rather than later.
AlbaNY_Ram