Mark Sherwood probably has 6. What's your count?
I can confirm that man know as Sharky who thought it was the greatest idea ever to play out a provisional on hole 7 at this year Hawk Hollow Open has won in 6 divisions. Now he just needs to play in Adv Grand Masters or bag and play in Rec to get his 7th.
Wins in Masters, Grand Masters, Senior Grand Masters, Advance, Advance Master, Intermediate
2016 Grand master, Senior Grand Masters
2015 Senior Grand Masters, Intermediate
2014 Senior Grand Masters, Intermediate
2013 Senior Grand Masters
2012 Grand Masters
2011 Masters, Senior Grand Masters (M Tier), Advance, Advance Master, Intermediate
2010 Advance Master
2009 No wins
2008 Grand Masters, Advance Master
2007 Grand Masters
2006 Grand Masters
2005 Grand Masters
2004 Grand Masters
2003 Grand Masters
2002 Grand Masters
2001 No wins
2000 No Wins
1999 Grand Masters
1998 No Wins
I should have gone to the gym instead of looking this up.