Why is this method being called multiple times?

I use a script that calls a few IEnumerators in the Start method only on the server. In the following IEnumerator it simply checks for the "last man standing" in a battle:

 IEnumerator CheckCurrentBattle()
 {
     yield return new WaitForSeconds(0.1f);
 
     if (currGameState == CurrentGameState.Battle)
     {
         int alivePlayerCount = 0;
         GameObject winningPlayer = null;
         GameObject[] players = getPlayerGameObjects();
 
         foreach (GameObject player in players)
         {
             if (!player.GetComponent<PlayerStats>().isDead)
             {
                 alivePlayerCount++;
                 winningPlayer = player;
             }
         }
 
         if (alivePlayerCount == 1 || alivePlayerCount == 0)
         {
             if (alivePlayerCount == 1)
             {
                 ------>winningPlayer.GetComponent<Player>().awardPlayerWin();<------
             }
             else
                 RpcServerMessage("Draw!", false);
 
             currGameState = CurrentGameState.BattleEnding;
             StartCoroutine(EndCurrentBattle());
         }
 
     }
 
     StartCoroutine("CheckCurrentBattle");
 }

However, the server method I call where the <---arrows---> are put are getting called multiple times. For example when 3 players are connected, this method will be called 3 times. This method is just a simple server method that increases some [SyncVar] variables:

 [Server]
 public void awardPlayerWin()
 {
     playerStats.playerGold += 5;
     playerStats.playerScore += 1;
 }

Why is this method being called multiple times instead of just one time on the server?