You know what would probably excite Oriole officials? Their affiliates going a full day without losing a prospect to an injury. Last night, Single-A Frederick lost outfielder Trent Mummey and first baseman Tyler Townsend, who has been of the system's most productive hitters, to hamstring injuries. A night earlier, Steve Johnson, who has been very good lately for Double-A Bowie, was forced out of the game after he was hit by a comebacker. Top prospect Manny Machado, a shortstop for Single-A Delmarva, just returned this week after missing about a month with a dislocated kneecap. Top pitching prospect Dan Klein, who has been dominant at Single-A Frederick and Double-A Bowie, is still experiencing right shoulder soreness and will have an MRI Monday. Pitching prospects Ryan Berry, Matt Hobgood and Luis Lebron are still in throwing programs and rehabbing injuries, while Brandon Erbe recently had a setback in his quest to return from shoulder surgery. First baseman Joe Mahoney, the organization's minor league player of the year last season, has played in just 10 games this season because of a variety of injuries. I'm sure I'm missing a couple of guys too, but the point is that it's tough for your farm system to make any progress when its top players can't get or stay on the field.