get_posts not pulling the correct number of posts

I am using the BracketPress plugin and trying to pull all of the posts of post_type brackets so I can send a newsletter blast to everyone with their current leaderboard position. However the get_posts that I am using seems to only pull half of the posts I should be pulling. Here's the code I am using.

$leaderboard_args = array(
    'meta_key'      =>  'score',
    'orderby'       =>  'meta_value',
    'order'         =>  'DESC',
    'post_type'     =>  'brackets'
);

$leaderboard = get_posts($leaderboard_args);
echo "<!--";
print_r($leaderboard);
echo '-->';

If you go to this link and view source you can see the array being outputted. The problem is, in the database there are 10 posts with post_type of brackets that have the meta_key score so I can't see any reason why they wouldn't be pulled. Even the master bracket (which should have the highest score and thus be pulled first) isn't getting pulled.

I am going to make some edits with more information as I dig through the database and try to figure this out.