GI Pegasus World Cup Turf S. winner Colonel Liam (Liam's Map) looms the one to beat in Saturday's GII Mervin Muniz Memorial S. at the Fair Grounds. Breaking his maiden on dirt via DQ in his career bow at Gulfstream last April, the $1.2-million OBS April topper was third next out in the slop there before switching to the grass, winning a Saratoga allowance in July. Fourth in the Saratoga Derby Invitational S. in August, the gray captured the Tropical Park Derby back in Hallandale Dec. 26 and followed suit...