Answer: OTS

AnswerCrossword Clue
OTSSubjects of a 1974 NFL rules change
OTSTie-breaking sessions, for short
OTSNBA tiebreakers
OTSNHL 4th periods, e.g.
OTSSome final periods: Abbr.
OTSExtra periods: Abbr.
OTSExtra sessions: Abbr.
OTSNHL tiebreakers
OTSTie-game resolvers: Abbr.
OTSFifth qtr. and such
OTSNFL extra periods
OTSSoccer shootout preceders, briefly
OTSTie-game settlers, briefly
OTS10th-inning counterparts, briefly
OTSSome NBA endings
OTSTies require them, briefly
OTSVery close NFL games sometimes require them
OTSDramatic NBA endings
OTSFifth qtrs.
OTSNBA regulation followers?
OTSWhen golden goals happen in the N.H.L.
OTSTie-breaker periods: abbr.
OTSExtra sessions, familiarly
OTSTiebreakers in hockey (abbr.)
OTSExtra NBA periods
OTSExtra game mins.
OTSExtra periods, for short
OTSPost-reg. periods
OTSNFL tiebreakers
OTSBonus NHL periods
OTSTiebreakers, for short
OTSTiebreakers on the gridiron
OTSBonus NFL periods
OTSExt. periods
OTSThey follow four qtrs.
OTSSudden-death periods, for short
OTSGame extenders: Abbr.
OTSSome sudden-death situations, for short
OTSFive-min. NBA periods
OTSDecisive periods, for short