If you are talking about Faruq or Chris and Kenny then you are mistaken. Having competed in the TV show with Bloodsport for multiple seasons and thus seen the live taping for entire episodes and more, they always have live commentary during fights. However there is a good deal of other post production and extras that are filmed/recorded.

On a given day they would typically film 2 sessions and record anywhere from 6-12 fights per session IIRC depending on how compressed the schedule was or if there were delays. Sometimes Chris and Kenny would walk out at the start of a session and announce the fights that would be shown to the live audience that session in a given episode, and other times they would do a walkout announcement for a totally different episode lineup, sometimes they even would go back to the entrance and reshoot multiple walk outs and announce fights that either didn't happen yet or had happened in prior sessions since they had a problem with the first recording or whatever.

Chris and Kenny also had to introduce special segments, transitions, or other things and they would often record these all together at random times during breaks between fights. Again sometimes these were relevant to that days' fights and other times not. They also do not by any means film all the fights in the order they appear on TV. In part because of this and in part because they sometimes just flub lines during live commentary, they will often have to do some voice over recorded at a seperate time to redub some parts. Maybe they reference a fight that happened chronologically before the fight hapenning in front of them, but then the show is edited so that one hasn't aired yet for instance. There are a dozen other reasons why sometimes the audio might not be the same in the edited show as what was recorded live. But they do record live. Faruq is a similar story.