Why has this 13 Year Old Riven player reached Challenger 4 Times?

RTO Learns Riven from Season 8 and 9 Challenger General Sniper on the North American Server. League of Legends Season 10. Riven Guide.

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General Sniper Twitch - https://www.twitch.tv/generalsniper1
General Sniper Twitter - https://twitter.com/GeneralSniperr

There is a Riven player who has reached challenger 4 times LP. In season 9, he got an incredible 55% win rate with Riven over 1163 games. His brother is V1per, LCS Top Laner playing for FlyQuest. The most insane stat is that he is currently only 13 years old, is in 8th grade and has played league competitively since Season 6. His name is General Sniper and I am so excited to have him on the channel.