One day in the not-too-distant past, a jockey who had taken a tumble at a Mid-Atlantic racetrack was required to get a doctor's note giving him the medical all-clear before he could ride at the same facility. And so, that's what he did. But rather than head immediately to a physician in that same state, the jockey hopped the border to ride at Laurel Park. After taking his mounts at the Maryland track, the rider swung by the office of Kelly Ryan, co-medical director for the Maryland Horsemen's Health Program....