a playoff system
... that Nippon Professional Baseball's Pacific League implemented a playoff system for three seasons that resulted in no playoff series being played?
... that <a href="./Nippon_Professional_Baseball" id="mwArY" rel="mw:WikiLink" title="Nippon Professional Baseball">Nippon Professional Baseball</a>'s <a href="./Pacific_League" id="mwArc" rel="mw:WikiLink" title="Pacific League">Pacific League</a> implemented <b id="mwArg"><a href="./Nippon_Professional_Baseball_playoffs" id="mwArk" rel="mw:WikiLink" title="Nippon Professional Baseball playoffs">a playoff system</a></b> for three seasons that resulted in no playoff series being played?