Video footage of the incident, which has now gone viral, shows Mr Clemente's colleague Van Tieu, who was clearly thrown by his colourful language, stumble mid-introduction.
Clemente then thanks Tieu for the introduction and begins talking about his history, saying he is a graduate of West Virginia University and: 'I’m used to, you know, from being from the East Coast.'
He goes on to read a news story about a fatal crash that happened earlier that day. Following complaints about the broadcast KFYR-TV responded with a post on Facebook.
Monica Hannan, KFYR-TV News Director wrote: "I want to apologize for an incident that occurred prior to our early newscast this evening, when one of our employees used profanity on air", adding: "He did not realize his microphone was on, but still, that's no excuse."
For his part, the hapless newsreader tweeted following the incident: 'That couldn't have gone any worse'.
Hannan also informed viewers that the news reader had been suspended following the incident.
Despite a concerted social media campaign, employing the hashtag #saveAJ, Mr Clemente took to Twitter this afternoon to announce he had been fired by KFYR-TV and was now a free-agent, writing: "Rookie mistake. I'm a free agent. Cant help but laugh at myself and stay positive. Wish i didnt trip over my "Freaking Shoes" out of the gate."