Count and Break.
<?php
$rows = get_field('career_grid');
if($rows){
shuffle( $rows )
$i = 0;
foreach($rows as $row){
$image = wp_get_attachment_image_src( $row['image'], 'full');
?>
<a href="<?php echo $row['link']; ?>">
<img src="<?php echo $image[0]; ?>" alt="<?php echo $image['alt']; ?>" />
</a>
<?php
if (++$i == 2) break;
}
}
?>
