Jon Heyman reports that the Tigers have acquired Gary Sheffield for Humberto Sanchez and two Class A pitchers, Kevin Whelan and Anthony Claggett. It's a superb deal for New York at first glance, as Sanchez has great stuff and profiles as at least a middle-rotation starter for years to come. Baseball Prospectus's Kevin Goldstein ranked Sanchez as the 11th best right-handed starting prospect in the game, holding him back only because of elbow concerns. The Yankees should have young guys comprising 60% of their rotation by the end of '07. And Whelan, if things break right, could be setting up..