Roy (Doc) Halladay was mowing them down in order last Saturday afternoon: 00, 01, 02, 03…. Routine. Twice on the day before starts and once more on game day, the Toronto Blue Jays righthander takes a laminated grid containing 100 randomly distributed numbers and locates each one in sequence: 37, 38, 39, 40…. Think of it as Sudoku for Cy Young winners. The purpose of the exercise is to narrow the focus of a lively mind to nothing but the next number, which helps Halladay sharpen his concentration on nothing but the next pitch when he reaches the mound. “I’m not one of those guys who’s worried about who’s on deck,” he says. When he began working the