John Gregorek of Georgetown, the IC4A 1,500-meter champion, will move up to two miles to challenge defender Suleiman Nyambui of Texas-El Paso at the NCAA Indoor Track and Field Championships, which start this morning at the new Joe Louis Arena in Detroit.

Gregorek's time of 7:56 for 3,000 meters, about 200 meters short of two miles, is the nation's best by a collegian. Gregorek posted it in winning at New York's Olympic Invitational.

The Hoyas' Jim DeRienzo, IC4A 1,000-meter winner, will battle Don Paige of Villanova and Rich Brody of Catholic in the NCAA 1,000-yard race.

Navy's Jeff Colvin, only one-tenth of a second off the world indoor record for 500 meters with his victorious 1:02.16 in the IC4A, will compete in the 600-yard race at Detroit. The Mids also are represented by freshman high jumper Leo Williams, who set an academy record of 7 feet 1 3/4 inches in placing second behind Franklin Jacobs of Fairleigh Dickinson at the IC4A.

Georgetown has entered a two-mile relay team of Rich Caton, Phil Reilly, Bill Ledder and Aubrey McKithen. Navy will field a strong mile-relay quartet of Mark Banks, Frank Moreman, Pat Bailey and Colvin.

Maryland, usually a threat to win several individual titles, has little to offer this time, with hurdler Renaldo Nehemiah nursing a sprained ankle and unable to defend his crown.