I got a Bronze 1 player in my Platinum 2 ranked games Someone explain how?

Well isn't it obvious? It's matching you with allies of equal skill. :^)

In all seriousness though, this definitely shouldn't happen.

Yeah I got a low iron in a mid gold mmr game. I think some players who are coming back on old accounts got placed in iron and their mmr is sky rocketing with just a few wins. I saw one account that missed season 8 and is just starting to play again. They are Iron 2 and playing in plat games already. Their record was 8-0

Because he's not bronze, legit all you had to do was look at his cs numbers to tell if he's really bronze or not.

Does he die a lot? Yes but that's what a lot of morons in plat/low diamond elo do anyways.

Did you look them up in post game? I have had instances where op.gg insisted I was silver 4 or silver 1 from time to time even though I had been plat for months, so something else could be wonky.

Because he has a similar mmr as you ^^

Just because someone is bronze doesn't mean they have a shitty mmr ^^