If the O's chase an ace

We're just five weeks into the 2013 season, but it's enough time to start gauging the performance of players, units or entire rosters. In Baltimore, the AL East leader (tie) at 21-13 entering play Thursday, have put up solid numbers across the board, ranking No. 3 in the circuit in runs scored and in the middle of the pack in terms of earned run average. There is a disparity, however, in how the Birds have posted their No. 7 team ERA of 3.83.