Sentence:  Keegan , a 6 - foot - 3 - inch 158 - pounder , gave up the Orioles ' last two <WSD>safeties</WSD> over the final three frames , escaping a load of trouble in the ninth when the Birds threatened but failed to tally . 
Meaning of the word marked with <WSD> tags:  (baseball) the successful act of striking a baseball in such a way that the batter reaches base safely