ok.. So First of all you can't possibly select from multiple tables without
joining them.
also there's nothing in
server_motd
table that is associated with any of the columns in
players
table so joining is not possible.
What you can do is create two different queries, 1 for players, 1 for server motd
PHP:
$player_info = $SQL->query("SELECT `id`,`name`,`level`,`reborn`,`experience` FROM `players` WHERE `players`.`group_id` < '.$config['site']['players_group_id_block'].' AND `players`.`name` != "Account Manager" ORDER BY `reborn` DESC LIMIT 1")->fetchAll();
$server_motd = $SQL->query("SELECT * FROM `server_motd`")->fetchAll();