Georgetown's John Thompson, coach of last season's most successful (23-8) area basketball team, said yesterday he has signed the guard he hopes can replace graduating senior Derrick Jackson.

He is Eric (Sleepy) Floyd, 6-foot-3 170-pounder from Gastonia, N.C. Floyd's outstanding qualities are quickness and shooting ability from the outside, the same qualities Jackson exhibited.

Jackson, The Washington Post's College Player of the Year, was referred to by Thompson as "My Mortgage" for the last four years.

Floyd averaged 23 points, 9 rebounds and 5 assists last season for Hunter Huss High School. He shot 53 percent from the field and three times scored 35 points. He was All-District and his team won the state title when he was a junior.

Thompson also said he had signed Ron Blaylock, 6-3 guard from Kernersville (N.C.) High School, the player of the year in Northwestern North Carolina last season. He is described by Thompson as a winner who can fill either guard position.

Georgetown loses five seniors, including Jackson and the top three reserves.

Thompson has seven scholarships available.

With the earlier signing of 6-7 Jeff Bullis of Bel Air, Md., Thompson has signed three players and would like to recruit two more - forward-center Bryant Johnson of Spingarn High School, most valuable player in the Capitol Classic, and a swing man in the mold of current Hoya forward Steve Martin.

Georgetown's need for another quick guard, to complement point guard John Duren, was evident at the end of the season. Jackson, with a bleeding ulcer, missed postseason competition.

"I'm very excited about Floyd," said Thompson. "He's proven that he can play either guard spot. He has great speed. He's the player we had to get . . . but everybody is untested until the start of the season."

Blaylock averaged 17 points and led his team to a 24-2 record last season. In four year, his teams have posted a 73-11 record in the state's highest classification and were ranked No. 1 this season until losing in the state championship tournament.

In his six seasons at Georgetown Thompson has built around Washington-area talent. He has not signed a local player this season. He apparently is making national inroads and North Carolina is one area that receives telecasts of Hoya games on cable TV, via WTTG-TV-5.