A trio of 3-year-olds from the barn of Todd Pletcher took to the Belmont dirt training track Friday morning as they prepare for stakes engagements during the Belmont Stakes Racing Festival. Mo Donegal (Uncle Mo), who defeated GI Preakness S. hopeful Early Voting (Gun Runner) in the GII Wood Memorial S. Apr. 9 ahead of a closing fifth in the GI Kentucky Derby May 7, breezed a half-mile in the company of his GI Central Bank Ashland S.-winning stable companion Nest (Curlin) in :50.02. Owned by Donegal Racing and Repole...