Here are 8 rules about the Ryder Cup that you may not know

The Ryder Cup is almost here. You have one last chance to discover more. You may be the coolest  golf enthusiast in the office by reciting these eight rules.

1.The Envelope rule: If a player on either team gets injured or sick and can't participate in the first two days, benched players can fill in shortly before a match.

In singles, everyone plays, so captains submit their lineups and player names in sealed envelopes before the matches start. If the opposing team loses a player to injury  

the submitted player will sit out.2.The Captain’s Agreement: The envelope rule appears in a Captains' Agreement(!), a multi-page document that contains topics you never thought

were important. Our Alan Bastable dissected it last year.3.The best Ryder Cup duo ever: Justin Thomas, Jordan Spieth. Justin Rose, Henrik Stenson. The most successful Ryder Cup

duo is Seve Ballesteros and José María Olazábal, per to records.All-time record? The duo has the most wins and points at 11-2-2.4.Love for lefties: (Moderately) Rookies 

Brian Harman and Robert MacIntyre became the fourth and fifth lefties to compete in a Ryder Cup, joining Peter Dawson, Bubba Watson, and Phil Mickelson.

5.Young Sergio: Sergio Garcia, who started for Europe at 19 in 1999, is the youngest Ryder Cup player.6.Oldest player:Raymond Floyd, 51, is the oldest Ryder Cup player.

7.The Ryder Cup today: From 1927 to 1977, the Ryder Cup was U.S. vs. UK. Irish players joined Great Britain in 1953, but the team wasn't titled Great Britain and Ireland until

1973, like the Walker Cup team. 8.Golf ball strategy: Foursomes players can now interchange golf balls on the tee.