His performances for Argyle also caught the eye of then Blackburn Rovers manager Kenny Dalglish who paid £500,000 to bring Marker to Ewood Park, with both Keith Hill and Craig Skinner moving in the opposite direction.
Marker's first team involvement at Blackburn was limited as he was largely used as backup for regular centre-backs Colin Hendry and Henning Berg, or holding midfielder David Batty.
He played no games in Blackburn's Premiership 1994/95 title-winning season primarily due to a snapped cruciate knee ligament.
In 2011, eleven years after his retirement, two hip replacements, and at the age of 46, Marker made a single appearance for Ivybridge Town, coming on as a late substitute in a South West Peninsula League match at home to Dartmouth.
In October 2010 it was announced that Marker had been appointed first team coach of Ivybridge Town, who play in the Premier Division of the South West Peninsula League.