Bad news for the troubled Washington Federals just got worse yesterday. Mike Holmes found his bruised right thigh so swollen he had to be admitted to Howard University Hospital and is listed as doubtful for Sunday's home game against New Jersey.

In addition, Victor Jackson, a defensive back who signed with the Federals Saturday, fractured his wrist on the opening kickoff in Sunday's game. He was fitted with a cast extending above the elbow and will miss at least four weeks. Wide receiver Willie Harris bruised his right thigh and is questionable for Sunday.

The only so-called good news could be that what was first diagnosed as a fractured sternum for Eric Robinson, the league's leading kick returner, may be only a severe bruise. Team officials said they won't be sure until later this week.

Holmes' bruise was not thought to be so serious immediately after the game. But his condition worsened and, after he reported to the training room at RFK Stadium at 7:30 a.m., he was taken to Howard Hospital.

The Federals (1-11, worst in the league) announced the signing of Ed Jackson, 25, a 6-foot-4, 280-pound defensive end from Maryland-Eastern Shore. He tried out as a free agent with Miami in 1980 and with the Redskins in 1982.