post “excerpt” not displaying for popular posts

My theme displays popular posts on the front page. Right now I can only see post titles and thumbnails. I found this in the functions.php, showing the layout that should appear but the excerpt is not showing up. Anyone know what I can do to fix it…I’m guessing it might be an easy fix. Thank you to anyone that can help!!

# Displays a list of popular posts
function fs_popular_posts($num, $pre='<li>', $suf='</li>', $excerpt=true) {
	global $wpdb, $post;
	$querystr = "SELECT $wpdb->posts.post_title, $wpdb->posts.comment_count, $wpdb->posts.ID, $wpdb->posts.post_content FROM $wpdb->posts WHERE $wpdb->posts.post_status = 'publish' AND $wpdb->posts.post_type = 'post' ORDER BY $wpdb->posts.comment_count DESC LIMIT $num";
	$myposts = $wpdb->get_results($querystr, OBJECT);
	foreach($myposts as $post) {
		echo $pre;
		?>
		<?php if (fs_settings('popular_thumb')=='enabled') : ?>
		<?php fs_attachment_image($post->ID, 'thumbnail', 'alt="' . $post->post_title . '"'); ?>
		<?php endif; ?>
		<a href="<?php echo get_permalink($post->ID); ?>"><?php the_title(); ?></a>
		<p><?php echo fs_clean($post->post_excerpt, 177); ?></p>
		<?php
		echo $suf;
	}
}