Single drum rollers 2015 1,898 h United States, San Antonio, Texas
Single drum rollers 2020 992 h United States, CREEDMOOR, Texas
Single drum rollers 1,156 h United States, Williamsburg, Virginia
Single drum rollers 2018 2,476 h United States, Salt Lake City, Utah
Single drum rollers 2016 1,389 h United States, Ruskin, Florida
Single drum rollers 2016 1,929 h United States, Crofton, Maryland