Hai Du Lam (born September 20, 1992), known in-game as Hai, is an American professional gamer who plays the multiplayer online battle arena (MOBA) game League of Legends and the Chief Gaming Officer (CGO) of Cloud9. Hai rose to prominence as the mid laner for Cloud9 (C9) of the North American League of Legends Championship Series. After a brief retirement due to health issues in 2015, Hai returned to the lineup of C9 as their jungler, and later support. He later became the mid laner for Cloud9 Challenger. Hai has won two NA LCS splits with Cloud9, as well as the NA LCS Promotion Tournament with Cloud9 Challenger. He is well known for his shotcalling within the game.