Eight years ago, Michael Putnam had the honor of hitting the opening tee shot of the 115th U.S. Open at Chambers Bay, just a stone’s throw from his University Place, Wash., residence. Greater Seattle is where Putnam and his younger brother, Andrew, honed their skills, and both went on to attend Pepperdine University in Malibu, not far from The Los Angeles Country Club. Michael, a member of the victorious 2005 USA Walker Cup Team, is no longer competing at the highest levels of professional golf, but the 40-year-old father of three remains close to the action as a caddie for Andrew, 34, a semifinalist in the 2006 U.S. Junior Amateur and now a PGA Tour regular. Andrew, who won the 2018 Barracuda Championship, shot 1-under 139 to make the cut this week at LACC. Michael wasn’t the only past Walker Cup competitor to caddie in the championship. Chris Williams, a member of the 2011 USA Team and former No. 1 amateur in the world who is now an assistant coach at Auburn, carried for Tigers junior Brendan Valdes.