The Pittsburgh Pirates made third baseman Jeff King of the University of Arkansas the first pick in baseball's draft of amateurs today. Auburn's Bo Jackson, who won football's Heisman Trophy, was picked in the fourth round.

The Kansas City Royals selected Jackson, the first choice in April's National Football League draft. In 1985, he hit .401, but this season was hitting .246 when the SEC ruled him ineligible for letting his prospective NFL team, the Buccaneers, pay his air fare to Tampa.

King hit .369 with 17 homers and 67 RBI this season and set school records with 42 homers and 204 RBI for his three years there.

Shortstop Gary Sheffield of Hillsborough High School in Tampa, a nephew of New York Mets ace pitcher Dwight Gooden, was chosen No. 6 by the Milwaukee Brewers.

Two sons of former Baltimore Orioles players were picked. Derrick May, a son of former outfielder Dave May, was picked ninth by the Chicago Cubs. Lee May Jr., a son of the former first baseman, was taken 21st by the Mets.

The Cleveland Indians selected left-hander Greg Swindell of the University of Texas with the second pick. The San Francisco Giants used the third pick on third baseman Matt Williams of Nevada-Las Vegas. Georgia Tech right-hander Kevin Brown was selected fourth by the Texas Rangers, then the Atlanta Braves chose Kent Mercker, a left-hander from Dublin, Ohio. Philadelphia chose right-hander Brad Brink of Southern California seventh.

The California Angels made outfielder Terence Carr of Salisbury, Md., the 25th choice.

The Orioles had forfeited their first-round choice by signing a free agent, veteran Juan Beniquez.