I have the following structure and am trying to remove an object in participants (league.division.participants).

var participantSchema = new mongoose.Schema({
player: { type: mongoose.Schema.Types.ObjectId, ref: 'Player' },
record: { type: mongoose.Schema.Types.ObjectId, ref: 'ParticipantRecord' },
events: [ { type: mongoose.Schema.Types.ObjectId, ref: 'Event' } ]
});

var divisionSchema = new mongoose.Schema({
    name: String,
    participants: [ participantSchema ]
});

var leagueSchema = new mongoose.Schema({
    name: String,
    startDate: { type: Date, default: Date.now },
    endDate: Date,
    locked: Boolean,
    leagueType: { type: mongoose.Schema.Types.ObjectId, ref: 'LeagueType' },
    game: { type: mongoose.Schema.Types.ObjectId, ref: 'Game' },
    divisions: [ divisionSchema ],
});

mongoose.model('League', leagueSchema);



var _RemoveDivisionParticipant = function(participantId)
{
    return new Promise((resolve,reject) =>{
        Models.League.findOne({'divisions.participants._id':participantId})
            .populate('divisions')
            .populate('divisions.participants')
            .exec((err, league) => {
                if (err) {return reject(err)}   
                league.divisions(XXXXX).participants(participantId).remove();
                console.log(league.divisions[0].participants[0])
            })
    })
}

This is what i have so far, but obviously it returns the league object, and i have no way of getting to the participants since I don't know which division the participant is in (Shown by XXXXX in the sample). Any pointers as to what I should do?