Originally Posted by RedEye
Yahoo! has it as Willy
and so does mlb
Or perhaps you were referring to this
I saw him play against the Reds when he was an Astro in 2005. The spelling of his name on the scoreboard at Minute Maid was "Wily." I remember distinctly that it was the same spelling as WMP. It's possible he has adopted the current spelling since then, but I know what I saw 3 years ago. Unfortunately, I can't find documentation of a spelling change, so I'll have to concede on this one for now.