nodejs mongodb loop

router.get('/player/:year', function(req, res) {
  var db = req.db;
  var collection = db.get('ratings');
  var year = req.param('year');
  collection.find({'sbYear': year}, ['Player_ID'], function(e, docs) {
    var players = [];
    var info = db.get('player_information');
    var wait = docs.length;
    docs.forEach(function(player) {
       var playerId = player.Player_ID;
       info.findOne({'Player_ID': playerId}, ['Player_ID', 'First_Name', 'Last_Name', 'Position' ], function(e, docs) {
         players.push(docs);
         wait--;
       });
    });
    function waitForCompletion() {
      if (wait > 0) {
        console.log("Wait is " + wait);
        setTimeout(waitForCompletion, 100);
        return;
      }
      res.send(JSON.stringify(players));
    }
    waitForCompletion();
  });
});