H.D. Woodson High School's unbeaten football team, having its finest season, is expected to forfeit as many as 10 of its 11 victories this week because it used an ineligible player. According to D.C. Public School Interhigh League sources, Woodson's longtime, successful coach Bob Headen could be suspended from all coaching duties as well as relieved of his position as athletic director at the school for a period of between one and five years.

Sources also said Woodson Principal Lucille Christian and athletic adviser Charles Thomas may be reprimanded by the superintendent.

Last week Eastern High filed a protest against Woodson, alleging the school had allowed 6-foot-2, 280-pound senior defensive lineman Anthony Satterthwaite to play when birth records show he was born Nov. 7, 1970, at Columbia Hospital for Women. League rules say a student can not compete in athletics if he turns 19 years of age before July 1 of that school year. League sources said a birth certificate indicating Satterthwaite -- who was a starter -- was born in 1971 was turned in and certified by the league athletic office.

"We are not saying the birth certificate received was tampered with but another birth certificate was discovered showing the player turned 20 on Nov. 7," said one school official. "It could have been an honest mistake but it happened. It's too bad it happened because it puts a damper on the accomplishments of the other players."

League Athletic Director Sam Jones, who is conducting the investigation, said yesterday he will conclude his findings and make his final recommendations to school officials this afternoon. District schools were closed yesterday for Veterans Day.

"I cannot make any comments on this matter yet. Nothing has been decided," Jones said. "All I can say is . . . a protest was lodged by Eastern and we had a meeting last week. Right now, everything is still being looked at."

Should Headen be disciplined, it would mark the fourth time he has been reprimanded for using ineligible football players at Woodson. The school had to forfeit two games in 1980, four games in '84 and three games in '88. In 1984, Woodson finished 9-0 before forfeiting the games and the division title. Headen was suspended from coaching from November 1988 through June 1989. Headen, who is also one of the winningest girls basketball coaches in the area, once received a reprimand and was forced to forfeit several games in that sport for using an ineligible player.

Headen, in his 27th year of coaching in the metropolitan area, was unavailable for comment yesterday.

School Superintendent Andrew Jenkins said yesterday that the Woodson situation is in the early stages but added that, because the title game is only nine days away, he hopes to have the matter cleared up by the end of the week.

"Mr. Jones has not given his final recommendations to our office yet. His decision goes to {Assistant Superintendent} Thomas Harper first. It is possible a hearing might have to be held. If the ruling goes against {Headen}, he certainly has the right to an appeal. The one thing I can say, we will expedite matters as quickly as possible.

"Each case is an individual case. Until a decision is made, Mr. Headen has done nothing wrong," Jenkins said. "I know he has been reprimanded before and in the last case, he was sanctioned."

Should Woodson, ranked fifth in The Washington Post poll, forfeit its games, Eastern (7-3, 4-1), which lost to the Warriors, 21-0, would be declared the East Division champion (with an upgraded record of 8-2, 5-0) and meet the West Division winner for the league championship Thanksgiving morning. Defending West titlist Wilson (6-2-1, 4-0), which lost a non-division game to Woodson, 7-3, can defend its division title with a victory at Coolidge today (2:30 p.m.).

Satterthwaite did not play in Woodson's 36-0 triumph over Spingarn Friday. Woodson is scheduled to play its final regular season game against Phelps this weekend.

The Interhigh League has had only one incident regarding forfeitures in the past several seasons.

There has been one forfeit in the area this season. Eleanor Roosevelt surrendered its Prince George's 4A football victory over Northwestern because of an ineligible player.