Leeds wanted to sign Wilson from Celtic in January 2012.

Former Celtic defender Mark Wilson has told William Hill’s Open Goal programme on YouTube that he saw a move to Leeds United fall through in January 2012 after failing a medical.
Wilson, 34, retired back in 2015 due to a number of problems with his knees, which saw him have plenty of operations in a bid to correct the problem throughout his short career.
He featured for Celtic for six years between 2006 and 2012, but was linked with a move to Leeds in January 2012 after falling down the pecking order behind Adam Matthews and Mikael Lustig.
Wilson said that he failed a medical at Elland Road due to a training session that inflamed his troublesome knee injury which dogged his career and eventually saw him retire at just 31 years of age.
“I got another operation on my knee and that put me out until January,” Wilson said. “I found myself down the pecking order. Adam Matthews was there and Mikael Lustig had just been bought.
“Lenny [Neil Lennon] said why don’t you go on loan. So I tried to go on loan to Leeds but I failed a medical because my knee was swollen from a training session the day before and that was it. I ended up just having to sit and train with the reserves.”

Wilson was a big hit with the fans after joining the club from Dundee United in 2006, winning three Scottish Premiership titles and two Scottish Cups with his boyhood side.
Leeds had Simon Grayson in charge during the January transfer window of 2011-12 before Neil Warnock was appointed in February, and one-time Scotland international Wilson would have had to rival the likes of Paul Connolly and Leigh Bromby for a place on the right side of the defence.

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