Over the years, Mick has landed 24 Grand Slams and has registered 23 of the 24 with IGFA. The IGFA referred to him as the “Collosus of the Grand Slam” (link to article). One day he got three Grand Slams in the same day.
The following link is an article, “Fishing in Grand Fashion”, written by the IGFA World Records Coordinator, Jack Vitek and documents “What it takes to catch an IGFA slam”