Sentence:  Keegan , a 6 - foot - 3 - inch 158 - pounder , gave up the Orioles ' last two safeties over the final three <WSD>frames</WSD> , 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) one of nine divisions of play during which each team has a turn at bat