The bout followed Anthony Crolla’s points defeat by Jorge Linares at Manchester Arena.
‘Sorry to everyone that missed me fighting,’ Okolie tweeted. ‘The good news is a win by KO in 20 seconds!! Bad news is I’m back in the cage for now.’
London-based Cave, 33, has now lost all three of his professional fights.
Okolie competed at heavyweight and lost to Cuban, Erislandy Savon at the last-16 stage at the Rio Olympics.
He had boxed Savon once before and lost via a first-round stoppage.
But at the second attempt, he went the three-round distance with the Cuban who would eventually claim a bronze medal.
Savon had lost to Nigerian-born Anthony Joshua at the London 2012, which also inspired Okolie.
Okolie had explained that the likes of Joshua lured him into boxing.
‘Before I started boxing properly I was working in McDonald’s, and I was watching the Olympics during my breaks whenever I could,’ he told Sky Sports News HQ.
‘It was the only thing to do! There was a particular break where Usain Bolt won the 100m then Anthony Joshua won gold. I felt something then.
‘It was really inspirational. I started putting more work into training, and believing it more.’
Okolie hopes to become a world champion within four years and is scheduled to fight on the undercard of Ricky Burns’ super-lightweight unification bout with Julius Indongo on April 15.
This post appeared on NEWSROOM.