Gray has been at the centre of most of the biggest moments in the club's history, from playing in the team that won two League titles and an FA Cup under Don Revie, to managing the last side to be relegated from the top flight in 2004.
So it was no surprise the Leeds legend did not want to be left out this week, turning up unannounced at Thorp Arch on Thursday to take in training and impart a few words of wisdom to Marsch and his relegation-threatened team.
"It was great having him here and really nice for me to have that experience," said Marsch ahead of Sunday's do-or-die visit to Brentford.
"He didn't come to give a talk but he was at the side of training and had a conversation with a couple of the guys.
"He has a lot of wisdom and has been very generous with me. We talked everything from what this club means to the community, to what it is like to represent Leeds United. He is incredibly positive.
"He told me that in the old stadium at Brentford it was always incredibly difficult to play there.
"With the newer stadium, it is really nice but the energy is not as powerful and maybe it's a little bit easier to play there now.
"But we will expect Brentford to be at their absolute best."
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