Don Baylor, Rich Gedman and Tony Armas hit home runs off Jack Morris in the first five innings to lead the Boston Red Sox to a 6-4 victory over the Detroit Tigers last night in Boston.

It was a particularly costly loss for Detroit as right fielder Kirk Gibson severely sprained his left ankle and will be sidelined for four to six weeks.

Morris, whose record fell to 2-2, had given up four homers in Detroit's 6-5 opening-day victory over Boston. Winner Roger Clemens (3-0) struck out 10 Tigers before leaving with two outs in the seventh.

Baylor gave the Red Sox the lead for good with his fourth homer of the season, a two-run shot in the third inning after Wade Boggs had singled. It made the score 3-2.

Boston got to Morris for two more runs in the fourth on Gedman's leadoff homer, his second, and Boggs' double that drove in Dwight Evans. Evans had walked, stolen second and gone to third when catcher Lance Parrish threw the ball into center field.

Yankees 5, Royals 1: In Kansas City, rookie Bob Tewksbury, making his third major league start, allowed five hits in 7 1/3 innings for New York.

Tewksbury (2-1) had three strikeouts and only one walk in pitching the Yankees to their ninth victory in 13 games, their best start since 1976.

Rickey Henderson, who reached base five times in the Yankees' 8-4 victory over the Royals Monday night, had a single and a triple and scored twice.

Angels 5, A's 1: Kirk McCaskill pitched a two-hitter and Doug DeCinces, Dick Schofield and Wally Joyner homered as California, at home, ended Oakland's four-game winning streak and regained first place in the AL West.

McCaskill (2-1) allowed only Alfredo Griffin's single in the third and Mickey Tettleton's RBI double in the sixth. He had a career-high 12 strikeouts.

Rangers 10, Blue Jays 1: In Toronto, Gary Ward drove in four runs with a single and a home run and Pete Incaviglia, Steve Buechele and Pete O'Brien also homered to lead Texas to the rout.

Rookie right-hander Bobby Witt overcame a bout of wildness to check the Blue Jays on three hits over six innings and pick up his first major league victory.

Earlier, Toronto announced that left-handed reliever Gary Lavelle had undergone surgery on his pitching elbow and would be out for the remainder of the season.

White Sox 5, Brewers 4: In Milwaukee, Harold Baines hit a three-run home run in a four-run seventh inning to help Chicago end a four-game losing streak.

Twins 7, Mariners 1: Mike Smithson (2-2) pitched a four-hitter and Mark Salas had a bases-loaded triple and a homer as visiting Minnesota handed Seattle its sixth straight defeat.