Delete player from localStorage

I have a hangman game that works with localStorage to save players' names and their scores, and there is a function that when the player wins eliminates the JSON object and then reinsertes it with the updated score:

comentarios = function () {
        mostrarVidas.innerHTML = "Te quedan " + vidas + " oportunidades";
        if (vidas < 1) {
            mostrarVidas.innerHTML = "Partida Terminada";
        }
        for (var i = 0; i < adivinadas.length; i++) {
            if (contador + espacio === adivinadas.length) {
                mostrarVidas.innerHTML = "Ganaste!";
                var index = -1;
                plc = [];
                for(var x in Jugadores){
                    var pl = JSON.parse(Jugadores[x]);
                    plc.push(pl);
                }

                var filteredObj = plc.find(function(item, i){
                    if(item.player === player){
                        index = i;
                        return i;
                    }
                });

                plc.splice(index, 1);
                var jugador_push = JSON.stringify({
                    "player" : player,
                    "score" : score + 1
                });
                Jugadores.push(jugador_push);
                localStorage.setItem("Jugadores", JSON.stringify(Jugadores));
            }
        }
    };

But when the function is executed I duplicate the records in the JSON according to the number of letters of the word to guess. Then separate it into another function:

uptade_marcador = function () {
        var index = -1;
        plc = [];
        for(var x in Jugadores){
            var pl = JSON.parse(Jugadores[x]);
            plc.push(pl);
        }

        var filteredObj = plc.find(function(item, i){
            if(item.player === player){
                index = i;
                return i;
            }
        });

        plc.splice(index, 1);
        var jugador_push = JSON.stringify({
            "player" : player,
            "score" : score + 1
        });
        Jugadores.push(jugador_push);
        localStorage.setItem("Jugadores", JSON.stringify(Jugadores));
    };

But I do not know in which part of the code to insert it so that the records are not duplicated

Here is the complete code of the game . Thank you in advance