'slow train coming' was the first 'BD' album that 'MK' played on and here is an excerpt from 'wikipidea':
Dylan first heard Mark Knopfler when assistant and engineer Arthur Rosato played him the Dire Straits single, "Sultans of Swing." Later, on March 29, 1979, Dylan caught the final show of a Dire Straits' residency at the Roxy in Los Angeles, California. Dylan approached Knopfler after the show, asking the guitarist to participate on his next album. Knopfler agreed, unaware of the nature of the material that awaited him.