Adding arrays to multi-dimensional array within loop

I am attempting to generate a multi-dimensional array with each sub array representing a row I want to insert into my DB. The reason for this is so I can use CodeIgniters batch_insert function to add each row to the DB.

I am attempting to create each sub array within a loop and insert it into a multidimensional array. Google suggested using array_merge, but after using 'print_r' on the multidimensional array with the code below, only the last sub-array is being displayed.

Here is my code:

$allplayerdata = array(); //M-D container array
for ($i = 1; $i <= 11; $i++)
{
    $playerdata = array(
                        'player_id' => $this->input->post('player' . $i),
                        'goals' => $this->input->post('playergoals' . $i),
                        'player_num' => $i,
                        'fixture_id' => $this->input->post('fixture_id')
                    );

    //Merge each player row into same array to allow for batch insert
    $allplayerdata = array_merge($allplayerdata, $playerdata);
}
print_r($allplayerdata);

Can anyone spot where I'm going wrong? Help is appreciated!