The Washington Redskins announced yesterday that they will not re-sign defensive end Karl Lorch. They gave him his unconditional release, thus making him a free agent who requires no compensation if signed by another team.

Lorch, who played six seasons in the National Football League, was a starter at the beginning of last season, but hardly played during the final half of the season. The Redskins' move came as no surprise, since team management had been quoted as saying that Lorch did not fit into the team's plans.

In Philadelphia, the Eagles announced that they will not re-sign tight end Keith Krepfle, who started all 16 regular-season games last year. In a prepared statement, Coach Dick Vermeil said the move was made by mutual agreement so that Krepfle, 30, could make his own deal. The Eagles expect John Spagnolo to become the starter. They also drafted two tight ends.

Bobby Beathard, Redskins general manager, said that he is not interested in signing Krepfle.

In Baltimore, Mayor William Donald Schaefer said he is almost certain to recommend to the City Council that the earliest starting time for Colts games on Sunday be moved up to 1 p.m. from 2 p.m. as the club has requested. Because of Sunday blue laws, a sports event cannot begin until 2 o'clock.