left the team
role was changed from reserve to base
role was changed from base to reserve
joined the team
How is the average MMR calculated
Calculation of the team average MMR is based on the main roster player's ranks. Each rank corresponds to a specific MMR value. The formula for calculating the average MMR of the team:
The sum of MMR for all players in the main roster / Number of players in the main roster
To calculate the MMR of a particular player, the rank of the current season is taken, if the user does not have a rank in the current season, then the rank of the previous season is taken. If the user does not have a rank in the current and previous season, then his MMR = 0 until he gets a rank.