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

admin/hooks/the-content.php

@@ -0,0 +1,24 @@
+<?php
+function sportspress_the_content( $content ) {
+    if ( is_singular( 'sp_team' ) && in_the_loop() ):
+    
+    elseif ( is_singular( 'sp_table' ) && in_the_loop() ):
+
+    	global $post;
+
+        // Display league table
+        $content .= sportspress_league_table( $post->ID  );
+    
+    elseif ( is_singular( 'sp_list' ) && in_the_loop() ):
+
+    	global $post;
+
+        // Display player list
+        $content .= sportspress_player_list( $post->ID  );
+
+    endif;
+
+    return $content;
+}
+add_filter( 'the_content', 'sportspress_the_content' );
+add_filter( 'get_the_content', 'sportspress_the_content' );