Dave Bergman's pinch-hit single with the bases loaded in the 10th inning drove in the winning run as the Detroit Tigers beat the visiting Boston Red Sox, 6-5, yesterday.

Boston had taken a 5-4 lead in the top of the inning. With two out, Detroit reliever Willie Hernandez (1-0) walked Glenn Hoffman. Pinch runner Ed Romero went to second on a single by Dwight Evans and scored on a single by Wade Boggs, who had four hits, including a homer.

Kirk Gibson started the Tigers' 10th with a single and went to second when Bob Stanley (0-1) walked Lance Parrish. Reliever Steve Crawford gave up an RBI single to Darrell Evans. Alan Trammell sacrificed both runners along. After Mike Laga was given an intentional walk, Chet Lemon hit a grounder that forced Parrish, then Bergman lined the first pitch into right, scoring Evans.

*Royals 7, Yankees 4: George Brett hit two home runs and Steve Farr pitched 4 1/3 innings of near-perfect relief as Kansas City won in New York.

Brett's first homer led off the third inning against Ed Whitson (0-1) and ended a 2-2 tie. It was the 194th home run of Brett's career, breaking the club record he shared with Amos Otis. Brett had a leadoff homer off Bob Shirley in the seventh to put the Royals ahead by 6-4. In the ninth, Frank White singled and scored on a double by Steve Balboni off John Montefusco, appearing in his first major league game since last May 14.

Farr came in with one out in the fourth and the potential tying run at third. He did not permit a base runner until Ken Griffey singled to start the eighth. Mike Pagliarulo then lined into a double play.

*Brewers 4, White Sox 3: Robin Yount had four singles, scored once and drove in a run as Milwaukee won in Chicago.

Chicago starter Richard Dotson (0-1) gave up five hits and four runs in six innings, his first regular season appearance in 10 months. He was sidelined last June 7 and had chest surgery in July.

The game was scoreless until the fourth. After Yount opened with a single, Paul Molitor and Billy Robidoux walked to load the bases with no outs. Ernest Riles struck out, and Rob Deer's checked-swing grounder to third scored Yount. Paul Householder followed with a double off the right-field wall to score two runs.

*Twins 5, A's 4: Kent Hrbek broke a 3-3 tie with an eighth-inning double off reliever Jay Howell, and Minnesota went on to win in Oakland.

Hrbek drove the ball into the right field corner to score Kirby Puckett from second. Hrbek scored on a two-out single by Roy Smalley. Puckett had opened the inning with a single and advanced on Mark Salas' sacrifice.

Minnesota right-hander Mike Smithson (1-0) went the distance, allowing eight hits.

*Blue Jays 3, Rangers 1: In Arlington, Tex., Doyle Alexander allowed seven hits in 8 1/3 innings and posted his 150th major league victory as Toronto spoiled rookie Edwin Correa's debut with Texas.

Correa, at 19 the youngest player in the big leagues, was struck in the left leg by Rance Mulliniks' line drive in the fourth inning and came out of the game after the fifth. He yielded five hits, struck out eight and walked two.

Toronto took a 2-0 lead in the fifth inning on singles by Damaso Garcia and Lloyd Moseby and a two-run double by Tony Fernandez.

*Angels 9, Mariners 5: Brian Downing hit a pair of two-run homers and rookie Wally Joyner hit one to lead California in Seattle.

Jim Slaton (1-0), who began the third inning after Angels starter John Candelaria developed a tender left elbow, allowed one unearned run over the last seven innings. Seattle starter Mark Langston (0-1) failed to survive California's five-run third. Five Mariners pitcher allowed 10 walks and 11 hits.