Weird "**PLAYER_SCORE_0" on post game statistics screen

http://68.media.tumblr.com/c92406e2bc8b8b1ff01820b6ccc8584d/tumblr_on1lbtc00x1qgwozbo1_1280.jpg After a game I just played, while looking at the stats afterwards, I noticed that there was a row called **PLAYER_SCORE_0, and it only appeared beside Ahri and Lux, who were both mid lane, if that's any reasoning for the glitch.