Syntax error on line 51?!

<?php
  define('CLAIMS', true);

  require_once 'includes/inc.core.php';

  $data = array('success' => false);

  if($_GET['action'] == 'scores')
  {
    $query = 'SELECT
                Hole1,
                Hole2,
                Hole3,
                Hole4,
                Hole5,
                Hole6,
                Hole7,
                Hole8,
                Hole9,
                Putts1,
                Putts2,
                Putts3,
                Putts4,
                Putts5,
                Putts6,
                Putts7,
                Putts8,
                Putts9,
                TotalPutts,
                Gross,
                AttendanceOnly
              FROM
                tblScores
              WHERE
                PlayerID = :player_id AND
                GroupValue = :group_id AND
                SeasonYear = :year AND
                PlayDate = :date
              LIMIT 1';
    $stmt = $database->prepare($query);
    $stmt->execute(array(
      ':player_id' => $_GET['player_id'],
      ':group_id' => $_GET['group_id'],
      ':year' => $_GET['year'],
      ':date' => $_GET['date']
    ));

    $data['success'] = true;
    $scores = $stmt->fetch(PDO::FETCH_ASSOC);

    array_walk($scores, function(&$data) {
      if($data == null)
        $data = 0;
    });
    $data += $scores;
  }
  else if($_GET['action'] == 'list_members')
  {
    $query = 'SELECT
                CONCAT(l.field_user_last_value, ", ", f.field_user_first_value) AS name,
                u.uid AS id,
                s.GroupValue AS group_id
              FROM
                dr_users AS u
                JOIN
                  (dr_users_roles AS ur
                    JOIN
                      dr_role AS r
                      ON
                        ur.rid = r.rid AND
                        r.name = "player"
                  )
                  ON
                    ur.uid = u.uid
                JOIN
                  dr_field_data_field_user_first AS f
                  ON
                    f.entity_id = u.uid AND
                    f.entity_type = "user"
                JOIN
                  dr_field_data_field_user_last AS l
                  ON
                    l.entity_id = u.uid AND
                    l.entity_type = "user"
                LEFT OUTER JOIN
                  tblScores AS s
                  ON
                    s.PlayerID = u.uid AND
                    s.SeasonYear = "' . $_SESSION['event']['year'] . '" AND
                    s.PlayDate = "' . $_SESSION['event']['date'] . '"';

    $stmt = $database->query($query);
    $players = $stmt->fetchAll(PDO::FETCH_ASSOC);
    $data['aaData'] = array();
    $data['success'] = true;
    foreach($players as $player)
    {
      $data['aaData'][] = array(
        $player['id'],
        $player['name'],
        $player['group_id'],
        '<span class="addPlayer"><a href="#" onclick="addToGroup(this); return false">Add to Group</a></span><span class="removePlayer"><a href="#" onclick="removeFromGroup(this); return false">Remove from Group</a></span>'
      );
    }
  }

  header('Content-type: application/json');
  echo json_encode($data);