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By Mark Lamport-Stokes
UNIVERSITY PLACE, Washington (Reuters) - Masters champion and world number two Jordan Spieth is one of golf's biggest drawcards, yet for many he will be playing second fiddle to his caddie at this week's U.S. Open at Chambers Bay.
Former school teacher Michael Greller has been working as Spieth's bagman since 2012 and, as a former Chambers Bay caddie, he is a popular figure within golf circles in this part of the Pacific Northwest.