I was very sorry to learn about the death of Horseman, the blogger behind Ulster's Doomed! - one of my favourite in recent years, and an occasional commentator here on Turbulence Ahead. I never got to meet him, and sadly now I never will. There's a nice tribute to him over at Slugger O'Toole, by the way.
I suspect his nom de plume had something to do with a well known headstone.
My condolences to his partner, children and his wider family.