We tend to think that Richie Martin is the leading candidate to break camp as the O's shortstop.  But is that true?   Defense will probably drive the decision.  Here is how they stack up: Career minor league numbers at SS 1. (tie)Reinheimer 973 fielding percentage, 4.63 RF/9 1. (tie) Alberto  962 fielding percentage, 4.83 RF/9 3. Martin    961 fielding percentage,  4.47  RF/9 4. Jackson  945 fielding percentage, 4.32 RF/9 Offense at their highest minor league level