Chase Field (formerly Bank One Ballpark) is the home field of Major League Baseball's Arizona Diamondbacks. The venue is one of the league's premier facilities, complete with a retractable roof, natural turf, and a swimming pool. Chase Field also hosts football, soccer, tradeshows, concerts, and other events. It seats between 3,000 (basketball) and 60,000 (concerts), depending on the event. The facility changed names in 2005 following the J.P. Morgan Chase and Bank One merger. It is owned by the Maricopa County Stadium District.