Is this user cheating?

Not sure if I am allowed to post his profile for the ' naming and shaming ' thing, but I played a ranked game yesterday and on my team was someone with a record of 18-0 I think it was. Got me thinking well he is a high ELO smurf from d1 or something. How I was wrong. He was maybe around 0-6 or something 15 minutes into the game and then I got attempting to reconnect. I couldn't get back into the game and then it was over. No match was in my history or anything and it was like I never played the game. This got me thinking after looking and this user played some more games and won them. So does he somehow ' end ' the games he will lose?
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