The two-time defending national champion Golden Gopher wrestling team will hold wrestle-offs Friday, Nov. 8, at 3 p.m., in the Bierman Gym on the campus of the University of Minnesota. The wrestle-offs are free and open to the public and media. Seating in the Bierman Gym is limited. Coaches expect 20-30 matches to be contested during the wrestle-offs.    Minnesota, the reigning National Duals, Big Ten and NCAA champion, returns six All-Americans and seven NCAA qualifiers from a team that completed a 19-0 record for the school1s first undefeated season. The Golden Gophers boast two returning national champions in 149-pound Jared Lawrence and 157-pound Luke Becker. The Maroon and Gold also return All-Americans in Ryan Lewis (133 pounds; second in 2002), Jacob Volkmann (165; fourth in 2001), Damion Hahn (184; fifth in 2002) and Garrett Lowney (heavyweight; fifth in 2002).    Minnesota opens the 2002-03 season on Friday, Nov. 15, at 7:30 p.m., with the Minnesota vs. Iowa Showdown at the Xcel Energy Center in St. Paul, Minn. Tickets for the Showdown are available through Ticketmaster at the Xcel Energy Center Box Office, all Ticketmaster locations, at 651-989-5151 or online at www.ticketmaster.com.