Successful and terrible player exits

Today I want to share with you some observations about the success of some teams in relation to players who have left during the season. Most of the players are present in almost all games of their team in active roles, but sometimes players transfer to other teams. I tried to evaluate such cases and find out how the team's performance changed after that. To assess the quality of games, I took the usual winrate - the proportion of victories to the total number of matches played.

So, with a limit of 20+ matches with a player and 20+ matches after his exit:

  • Chandler Stephenson started the season with the Washington Capitals and has 34 games
  • He played 28 matches and the winrate was 71% (for all 34 matches)
  • After his leaving (50 matches) - only 50%

Another case:

  • Oliver Wahlstrom started in the New York Islanders (games 2-22, played 12 games)
  • Winrate was 71%. In the remaining 76 games, the team's winrate was just 50%

On the contrary, for the Philadelphia Flyers team, with the departure of the players Mikhail Vorobyev (22 matches) and Chris Stewart (21 matches), the winrate has grown from 47-48% to 69% (for the remaining 42 and 39 matches).

With a decrease in the limit on the number of matches with a player and after his departure to 10:

The Los Angeles Kings increased winrate after the departure of a number of players:

  • Carl Grundstrom - 17 games (1-64 team match) - 36% - 77%
  • Tyler Toffoli - 62 games (2-66 team match) - 37% - 73%
  • Alec Martinez - 45 games (1-66 team match) - 38% - 73%
  • Kyle Clifford - 57 games (2-61 team match) - 37% - 63%

And, on the contrary, for the Pittsburgh Penguins, the departure of players was unsuccessful, the winrate fell:

  • Dominik Kahun - 54 games (2-65 team match) - 61% - 27%
  • Andrew Agozzino - 20 games (1-67 team match) - 58% - 31%
  • Alex Galchenyuk - 46 games (2-60 team match) - 61% - 35%

And for Washington Capitals:

  • Ilya Samsonov - 30 games (1-73 team match) - 62% - 36%
  • Brendan Leipsic - 65 games (1-68 team match) - 63% - 38%