Fix bugs, use plural post slugs, move actions and filters into hooks folder

admin/hooks/admin-post-thumbnail-html.php

@@ -0,0 +1,26 @@
+<?php
+function sportspress_admin_post_thumbnail_html( $translated_text, $post_id ) {
+	$texts = array(
+		'sp_team' => array(
+			'Set featured image' => 'Select Logo',
+			'Remove featured image' => 'Remove Logo',
+		),
+		'sp_player' => array(
+			'Set featured image' => 'Select Photo',
+			'Remove featured image' => 'Remove Photo',
+		),
+		'sp_staff' => array(
+			'Set featured image' => 'Select Photo',
+			'Remove featured image' => 'Remove Photo',
+		),
+	);
+
+	$typenow = get_post_type( $post_id );
+	if ( is_admin() && array_key_exists( $typenow, $texts ) ):
+		foreach ( $texts[ $typenow ] as $key => $value ):
+			$translated_text = str_replace( __( $key ), __( $value, 'sportspress' ), $translated_text );
+		endforeach;
+	endif;
+	return $translated_text;
+}
+add_filter( 'admin_post_thumbnail_html', 'sportspress_admin_post_thumbnail_html', 10, 2 );