5) Paul Tierney – 25
Tierney is a rather strange combination when it comes to officiating matches. He averages only 17.43 fouls per match, which is the fourth-lowest among top-flight referees this season.
There are also only three other officials who average fewer fouls per tackle (0.51). However, when Tierney does blow up for an offence, you are more likely to go into the book. He is joint second for yellow cards (25).