There is no evidence of a real-world news story involving a professional female sports or news announcer being insulted in a "relay" event under this specific name. Instead, this string is commonly found on:
I'll try searching for "relay reika". #1 seems to be a LiveJournal post about "Relay Review" from Precure. That might be relevant. I'll open it. is a review of a Precure episode featuring a character named Reika. But it doesn't match the keyword. i woman announcer insult relay reika sddm 143 new