Thistledown: The GIII, $500,000 Ohio Derby at 1 1/8 miles (Kentucky Derby qualifying points: 20-8-4-2) Brian handicaps at Capital OTB and Horseplayer Now, and he’ll offer analysis and selections of Derby points races, hoping to make us all a little money as we head to the Belmont Stakes. Follow him on Twitter here. It’s not often we see the…