UNIVERSITY PLACE, Wash. (AP) -- The number is around 60, give or take, with a rumble that is part of the soundtrack to an already unique U.S. Open.
Related Stories
- The courtship of Chambers Bay at US Open The Associated Press
- The U.S. Open is going to get weird SB Nation
- Chambers Bay is the perfect U.S. Open course SB Nation
- Most important figure at US Open not even playing The Associated Press
- U.S. Open hears the train a comin' … 45 times a day Yahoo Sports
About half the time, it comes from the north behind the 15th green and near the 16th tee where the one tree at Chambers Bay stands guard.