A lightweight division attraction has been added to the World Series Of Fighting 31 as Jason High battles Mike Ricci. High is currently undefeated in UFC competition, having defeated Estevan Payan at the WSOF 25. Ricci is also undefeated in WSOF competition, having defeated Joe Condon at the WSOF 25. World Series Of Fighting 31 takes place on June 17th from the Foxwoods Resort Casino in Mashantucket, Connecticut with no headliners announced as of yet.