USA Wrestling has announced the five-member pre-seed committees in all three Olympic wrestling styles for the U.S. National Championships, which will be contested in Las Vegas, Nev., April 29-30.    A new procedure has been approved where a committee will evaluate the wrestlers who have pre-registered to compete and will pre-seed each weight class.    The pre-seed committee structure has been approved by the Sports Committee in each style. Included on the committees are representatives of the three top-scoring wrestling clubs from last year's U.S. Nationals, as well as the USA Wrestling National Coach in each style, plus an additional committee member approved by the president of USA Wrestling.    All athletes in all divisions must pre-register on-line or by mail before 12:00 noon Pacific time on Tuesday, April 26. No athlete may be added to the competition after this deadline date.    The pre-seeding conference calls will be held during the afternoon on Tuesday, April 26. The pre-seeding committee will seed eight athletes in each weight class, which will then be published on TheMat.com and provided to the wrestling media.    At the U.S. Nationals, a seeding meeting will be held, with representatives of the club programs included. There will be an opportunity to adjust the pre-seeds at that time, with a two-thirds vote required for change. If there is a desire to have more than eight seeds at any weight class, the additional seeds may be added on a majority vote of the club representatives.    For information, as well at to pre-register for the tournament, visit the U.S. Nationals website at:  http://www.lvsports.org/current_events.html    MEN'S FREESTYLE PRE-SEEDING COMMITTEE  Kevin Jackson, National Freestyle Coach  Tom Brands, at-large member  John Smith, Gator WC  Joe Seay, Sunkist Kids  Greg Strobel or Kerry McCoy, New York AC    WOMEN'S FREESTYLE PRE-SEEDING COMMITTEE  Terry Steiner, National Women's Coach  Lee Allen, at-large member  Kip Flanik, New York AC  Carl Murphree, Missouri Valley College  Joe Corso, Sunkist Kids    MEN'S GRECO-ROMAN PRE-SEEDING COMMITTEE  Steve Fraser, National Greco-Roman Coach  Dan Chandler, at-large member  Shon Lewis, U.S. Army  Rich Estrella, U.S. Air Force  Shawn Sheldon, New York AC