Iowa State's Cael Sanderson has stepped onto the wrestling mat 119 times during his amazing college career.     And all 119 times his hand has been raised in victory.     Considered by many to be the best wrestler in NCAA history, Sanderson enters his senior season trying to become the first competitor to finish a four-year career unbeaten.     Sanderson will resume his quest for perfection as sixth-ranked Iowa State is slated to take part in the Harold Nichols Open on Saturday in Fort Dodge, Iowa.     After winning national titles the past three years at 184 pounds, Sanderson will move up to 197 for his final season.     "Cael is right on track to wrestle at 197," Iowa State coach Bobby Douglas said. "Moving him up a weight has been part of the plan all along. We don't want any of our people cutting weight and we want Cael as close to his natural weight as possible."     Sanderson passed up a chance to wrestle at the rescheduled World Championships to focus on his final collegiate season. Sanderson originally planned to compete in the event in September, but his plans changed after the meet was pushed back because of the Sept. 11 terrorist attacks.     "It was a big decision," Douglas said. "Cael is such a class act that he put his team at Iowa State before his own personal success. You don't find many wrestlers willing to do something like that.     "Cael's record is unbelievable. I don't think I will see another collegiate wrestler in my lifetime like Cael Sanderson. He may be one of a kind."     The Cyclones lost four starters from last season, but bring in a number of top transfers and newcomers.     "We want to be in the top three in the country and win the Big 12," Douglas said. "We are the longshot, but that's the way we like it. We may surprise some people."     It's open season on the wrestling mats as a number of top NCAA teams open their seasons in open tournaments this weekend.     Defending national champion and top-ranked Minnesota, which returns eight All-Americans, is scheduled to open its season at the Bison Open in Fargo, N.D.     Second-ranked Oklahoma State is not scheduled to open its season until Nov. 17 at the Cliff Keen Open in Tulsa.     Third-ranked Oklahoma is slated to compete at the Oklahoma Gold Classic in Brockport, N.Y. The Sooners return four All-Americans - Witt Durden (133), Jared Frayer (149), Josh Lambrecht (184) and Leonce Crump (heavyweight) - and three national qualifiers from last year.     "There is no question that this is the most talented team that we've had here at OU since I've been here," Oklahoma coach Jack Spates said. "This team is very competitive and has the talent and work ethic to contend for a national championship."     Fourth-ranked Michigan competed at the Eastern Michigan Open on Nov. 3, winning titles in seven of the 10 weight classes. A.J. Grant (125), Clark Forward (141), Mike Kulczycki (149), Ryan Bertin (157), Otto Olson (174), Andy Hrovat (184) and Matt Brink (heavyweight) all won championships.     The Wolverines are scheduled to compete in the Michigan State Open on Nov. 17 and 18.     Fifth-ranked Iowa is expected to compete at the Kaufman-Brand Open on Nov. 17 in Omaha. The Hawkeyes finished second in the nation last year after winning the previous six NCAA championships.