Mickelson shoots 1st round 63 at British Open, now favored in Vegas

Phil Mickelson's British Open odds have dropped to 4/1 after 1st round.

WESTGATE LAS VEGAS SUPER BOOK

UPDATED ODDS TO WIN 

2016 BRITISH OPEN following 1st rd

Jason DAY 7/1 (opening odds) 30/1 (current odds after 1st round)

Rory McILROY 8/1 12/1
Jordan SPIETH 8/1 20/1
Dustin JOHNSON 12/1 20/1
Adam SCOTT 20/1 20/1
Rickie FOWLER 25/1 25/1
Justin ROSE 25/1 20/1
Sergio GARCIA 25/1 15/1
Branden GRACE 25/1 50/1
Danny WILLETT 30/1 100/1
Louis OOSTHUIZEN 30/1 100/1
Henrik STENSON 30/1 15/1
Phil MICKELSON 40/1 4/1
Hideki MATSUYAMA 40/1 150/1
Shane LOWRY 40/1 1000/1
Bubba WATSON 50/1 60/1
Zach JOHNSON 50/1 20/1
Brandt SNEDEKER 50/1 200/1
Paul CASEY 50/1 1000/1
Lee WESTWOOD 50/1 80/1
Martin KAYMER 50/1 12/1
Patrick REED 50/1 15/1
Matt KUCHAR 60/1 100/1
Jim FURYK 60/1 500/1
Matthew FITZPATRICK 60/1 500/1
Charl SCHWARTZEL 60/1 150/1
Marc LEISHMAN 60/1 500/1
Justin THOMAS 80/1 50/1