Following is a biographical sketch of each of players drafted by the Bullets in the NBA draft: GREF BALLARD (1st Round)

6-7 220 forward Oregon

One of college basketball's best rebounding forwards last season, Ballard was overshadowed by UCLA's Marques Johnson during most of his career. But he still made All-Pacific Eight Conference his junior and senior year and outscored Johnson in two head-to-head meetings this season.

Ballard average 21.7 points and 9.8 rebounds in 1976-77 and 15.9 points and 9.8 rebounds for his career. He holds seven school records, including the marks for rebounds and shooting (51 per cent). He also is considered a fine defensive player, coming off a squad rated fifth nationally in defense last season. Ballard's high game was 43 points in an NIT contest against Oral Roberts. Bo Ellis (1st Round)

6-9 190 forward Marquette

Coach Al McGuire called Ellis the "Secretariat" of college players last year. The new Marquette coach, Hank Raymonds, says Ellis is the smartest player he's seen. Ellis' specialty is rebounding. He finished as marquette's second best career rebounder, averaging over nine a game.

McGuire believed Ellis' individual statistics (he average 15.6 points for his career) would have been more impressive if he had played on a run-and-shoot team. Ellis was asked to provide leadership and play strong defense at Marquette, and was an instrumental force in the Warriors' national championship victory. He started all four seasons for McGuire. Phil Walker (2nd round)

6-2 1/2 190 guard Millersville State

Walker is Millersville (Pa.) State's alltime leading scorer and its most valuable player in the Pennsylvania State College Conference last year, averaging 26.9 points and 13.4 rebounds on a 16-10 club. He was a second-team NCAA Division III All-America and MVP in two holiday tournaments.

His coach, Dick DeHart, describes him as a quick, explosive player, "very graceful, a real smooth operator out there. I think he has all the tools to be a good pro. He jumps so well that we had him jump center for us." Miller, who just turned 21, is a product of the Philadelphia high school system. Steve Puidokas (3d round)

6-11 1/2 260 center Wash. State

Puidokas helped coach George Raveling turn around the basketball program at Washington State. A four-year starter, he averaged 18.5 points for his career and 17.2 points last season, finishing as the Cougars' alltime leading scorer. He also holds the school career, mark of 9.7 rebounds a game.

Raveling says Puidokas, who was second-team all-conference for four years, is an exceptional shooter within 15 feet. However, he could have a problem in the NBA because of a lack of quickness. Jerry Schellenberg (3d round)

6-6 216 forward Wake Forest

Schellenberg was a swingman on Wake Forest's NCAA tournament basketball team last season. He has an exceptional shooting touch and fine defensive hand. He averaged 14 points as a senior, shooting 48 per cent from the field. He gained a reputation as a fine clutch player, but was considered one of the slower players in the Atlantic Coast Conference. David Reavis (4th round)

6-5 215 forward Georgia

A product of Mackin High, Reavis played just one season at Georgia, averaging 14 points and shooting 50 per cent from the field. He is considered a fine one-on-one Player who scores mainly from within 10 feet of the basket. Bruce Parkinson (5th round)

6-2 175 guard Purdue

Parkinson was one of the last players cut from the Olympic tryout camp last summer after coming off a serious knee injury. He averaged 8.7 points and five assists his senior season but shot only 40 per cent from the field. Ernest Wansley (6th round)

6-10 230 center Virginia Tech

Virginia Tech relied on Wansley to supply rebounding and defense on its postseason tournament teams the last two years. He averaged nine points and 7.5 rebounds last season while shooting 46 per cent. Calvin Brown (7th Round)

6-4 195 forward American

Brown, who attended Roosevelt High, is AU's 5th alltime scorer (17.2 point average). He averaged 20 points and six rebounds his senior year. Pat McKinley (8th Round)

6-7 185 forward Towson State

McKinley holds Towson's career records for rebounding and scoring. He averaged 17.5 points and 13.3 rebounds last season for the highly rated Tigers.