By J. Keeler Johnson (''Keelerman'') Twitter: @J_Keelerman
With a purse of $1 million, Saturday's Pennsylvania Derby (gr. I) at Parx
Racing has attracted some of the best three-year-olds currently in training. ''Currently,''
of course, is the key word, since many of the division leaders (Country House, Sir
Winston, Game Winner, and now ...