William Seymore is an American soccer midfielder who currently plays for New Mexico United in the USL Championship.

New Mexico United is an American professional soccer team based in Albuquerque, New Mexico. Founded June 6, 2018, the team currently plays in the USL Championship, the second division of American soccer. The team is owned by Peter Trevisani, with head coach Eric Quill, and play their home games at Isotopes Park which has a capacity of around 13,500 people.