Your Matchmaking Rating (MMR) is a number that Riot uses to determine your skill, and when matchmaking, the skill of your opponents. Matchmaking is the existing automated process in League of Legends that matches a player to and against other players in games. Contents[show] Details The. Glad I quited this garbage (lol) months ago. Seems nothing has changed I admit I'm biased against mmr matchmaking. I can't help it. Back in. Matchmaking would have to look at players much further from your MMR because it's unable to fill a lobby, your queue time would increase.