Louis Oosthuizen, Jason Day and amateur Paul Dunne share the lead at St. Andrews, but Jordan Spieth is only one back as he looks to win the third leg of the Grand Slam. Here are some key stats provided by Golf Channel's editorial research unit.
• 14 players at/within three shots of lead (most through 54 holes since 2001 when there were 23)
• Last six major champions held 54-hole lead or co-lead
• Only five Open champions since 1895 were outside top-6 after 54 holes
• Only one Open...