NAPA, Calif. (May 23, 2013) -- Mark Miller and Gary Vanier posted a second-round 7-under 65 and extended their lead to four shots after two rounds of play at the 2013 Northern California Senior Four-Ball at Sliverado Resort.
Miller and Vanier led after Round 1 thanks to a 9-under start. They stayed hot with one of the day's lowest marks on Thursday.
They'll enter Friday's final round with a four-shot lead over Robert Fulton and Dan Bieber, who shot a second straight 66 on Friday.