This weekend, the man in the middle will be County Durham's Geoff Eltringham.
Eltringham was last the man in the middle at a Royals match in February when he watched Millwall steal all three points with two goals in three second half minutes - securing a 2-0 win at Madejski Stadium.
He followed Reading on the road last in April 2017 when a Yann Kermorgant brace wasn't enough to rescue anything from a City Ground defeat to Nottingham Forest.
He did however hold the whistle in a Royals away win the previous month - Kermorgant on target as well as Adi Popa as Ali Al Habsi' heroics earned us a valuable 2-0 win at Hillsborough. And the previous year, in April 2016, he sent off Bolton's Rob Holding as the Royals snatched a 1-0 win thanks to Ola John's long-range effort.
This referee was last at Griffin Park in February and Brentford enjoyed themselves that day - romping to a 5-0 home win over Birmingham City courtesy of goals from Ollie Watkins (two), Florian Jozefzoon, Neal Maupay and a Marc Roberts own goal.
Eltringham's path to refereeing came through the Russell Foster Tyne and Wear Youth League, Northern and UniBond leagues and then the Blue Square North and Blue Square Premier. In 2008, he was appointed on to The Football League list as an assistant. Just a year later, he was upgraded to referee.
So far this season, he has shown 29 yellow cards in 9 games, sending Macclesfield's Michael Rose off last weekend at Morcambe to show his first red card of the campaign.
On Saturday, Eltringham will be assisted by Mark Pottage and Billy Smallwood, while the fourth official is Alan Young.