About the topic: How about some simple phrases and a pre-race introduction and information about the current championship like in GRID Autosport?
Pre-Race would be for example:
"It's a short championship, but this doesn't means it is boring."
"Is there anything that could stop the current №1 from winning this championship?"

In-race commentry would be:
"It seems like the athmosphere on the track is quiet aggressive."
"That was a hard hit, probably not easy to recover from that one."
"Someone left the track, that costs a lot of time."
"Another driver is out of the race."

Classically the two commentators are an expert and a former driver, it is probably obvious that Hellfire would play the role of the former pilot.