So it was just a coincidence that Eugene happened to have two collisions causing repeat injuries? And he came back without a vertical jump. The fact that he played was impressive and showed amazing determination but he clearly was not nearly as effective.
If you saw the injuries and watched in slow motion, then you'd say "yes" it was just coincidence.
The first injury as a sophomore was hard knee-to-knee contact to the side of his knee while his foot was being stepped on, immobilizing his leg while it took impact.
The second injury as a junior was a hit in from behind while in the air for an offensive rebound, which forced him to fall backward with his full weight on his left leg pinned beneath his body.
Neither of those are normal contact, and both would have resulted in injuries to other players (not just Omoruyi).
He had a third injury against Iowa where his left foot hit a wet spot and slid out from under him - and that would have been fine, just falling on his butt. Unfortunately, after his foot slid out and his weight headed toward the ground, the outside of his sneaker caught traction, which twisted his ankle inward and jammed his foot to a stop, which caused his knee to hyperextend.
Not saying it can't (or won't) happen, but we haven't seen his knee go out due to instability or fatigue - it's always been abnormal circumstances.