Catcher Tim Raley, who led Potomac to an unbeaten season (20-0-1) and the Virginia AAA state baseball championship, and David Vaughan of Bowie and Jeff Bengtson of Springbrook, both first-team selections last year, were unanimous choices for The Washington Post's 13-player all-Metropolitan high school team.

The team is picked by a consensus of area high school and college coaches, major league scouts and The Post's scholastic staff.

Selected player of the year, Raley, a left-handed power hitter with a fine throwing arm, was picked in the 11th round by the Texas Rangers in the recent draft. He hit .534--one of five first-team selections to bat .500 or higher--with nine home runs and 42 RBI.

Tyler Wolfram of Springbrook (8-1) led all-Met pitchers in strikeouts (94), ERA (0.60) and fewest hits allowed (30). A junior, he had one no-hitter and two one-hitters; he also batted .482, with 12 extra-base hits and 22 RBI.

Vaughan, 11-0 last year, finished the season 8-1 with 68 strikeouts in 61 innings. Right-handers Darryl Wright of De Matha and Paul Sterling of Eleanor Roosevelt, both 9-0, had 73 and 64 strikeouts, respectively, and yielded fewer than four hits per game.

Sophomore Darin Campbell of De Matha, the designated hitter, had 12 homers and 44 RBI. He had an on-base percentage of .693 and batted .462.

O'Connell batted well over .400 as a team mainly because of outfielder Terry Belt and shortstop John Morabito. Belt scored 38 times and batted .540. Morabito, a junior, batted .538, with 14 doubles, two triples and six homers among his 49 hits. He also was 6-0 as a pitcher, with an ERA of less than 2.00.

Morabito, third baseman Bengtson--who was first team as a pitcher in 1982--second baseman Glenn Spencer of Falls Church and first baseman Scott Simpson of Landon were solid both at bat and in the field.

Simpson hit .574, with 14 extra-base hits and an on-base percentage of just under .700. Spencer made only four errors and batted .400.

Bengtson recovered from a slow start and batted close to .500 in the second part of the season. He finished at .380, with 25 RBI and five home runs. Bengtson also was 7-0 as a pitcher, with an ERA of 1.65 and 67 strikeouts in 46 2/3 innings.

Also in the outfield are Langley's Todd Jones and Paint Branch's Vernon Jackson.

A second-team pick in 1982, Jackson didn't make an error this year and stole 20 bases in 21 attempts. Batting leadoff, he had 25 hits for an average of .521, scored 24 runs and drove in 17.

Jones batted .491, with nine doubles and six home runs. He also had 24 RBI and drew 15 walks.