Undated (AP) _ The Orioles activated infielder Bill Ripken from the 15-day disabled list Friday and sent infielder Rick Schu to the minor leagues. Schu has the option to accept or refuse his assignment to Rochester in the International League, because he has three years of major league experience. If he refuses the assignment, he becomes a free agent. Ripken has been disabled since March 26, a day after he suffered a hairline fracture in his left hand in an exhibition game. ... Dave Schmidt made his 300th major league appearance Friday. Boston

John Dopson, 2-0, struck out a career-high nine in his first American League start Friday as the Red Sox beat Baltimore 7-4. Dopson was 3-11 as a rookie last season with Montreal. California

Shortstop Dick Schofield did not accompany the team to Seattle, staying behind to undergo a bone scan and MRI test on his right rib cage area Friday at Centinela Hospital. Schofield could miss up to seven days, but the team is reluctant to place him on the disabled list. Cleveland

John Farrell was scheduled to come off the disabled list Saturday and start against Milwaukee on Sunday. Chicago White Sox

Catcher Carlton Fisk had a fiber glass cast on his injured right hand where he has a slight break. Doctors were still trying to decide whether they should use pins to fuse the slight crack. Fisk missed 70 games last year with a break in the same hand but doctors claim the two injuries are not related. ... White Sox first baseman Greg Walker was back in the lineup after suffering a strained left quadricep three days ago. ... Two ceremonial first pitches were thrown for the White Sox home opener Friday. Mayor-elect Richard M. Daley threw one and retired Appellate Court Judge Joseph Burke threw the other. Burke is 101 and remembers when the White Sox came into being March 21, 1900. Detroit

Mike Heath was scratched from Friday's game with a back injury and is listed day to day. Kansas City

The Royals have not won a season series against the Toronto Blue Jays since 1985. Milwaukee

Paul Molitor was back in the lineup and pitcher Teddy Higuera was on his way back to Milwaukee, but not to play. Molitor was activated from the 15-day disabled list after sitting out the first seven games while recovering from a torn ligament in his right ring finger. He injured the finger while horsing around with teammate Dave Engle with one day left in spring training. He hit a two-run homer Friday in the eighth. ... Gary Sheffield returned to the lineup Friday after missing two games with a sore thigh muscle. Sheffield, however, was at third base and not at shortstop. Minnesota

Frank Viola went 16-1 last year between losses to the Yankees on opening day and to Toronto on July 27. ... The Yankees have beaten Viola on opening day the last two years ... Gene Larkin was hit by a pitch 15 times last season - high in the American League. He was hit for the first time this season on Friday night ... Tim Laudner is the last catcher to throw Ricky Henderson out at third base. Since Laudner nabbed him last April 28, Henderson has stolen third 28 straight times. New York Yankees

Right-hander Richard Dotson said he was ''given a clean bill of health'' after X-rays of his right shoulder proved negative. Dotson, who struggled during spring training, has allowed seven hits and four runs in three innings this season for New York. Dotson said he had an arthrogram and no damage was discovered to his shoulder. Dotson, who was acquired from the Chicago White Sox prior to the 1988 season, was 12-9 for the Yankees last season with a 5.00 earned-run average. He was on the disabled list last year from July 1 to July 18 with a pulled left groin. ... The Yankees took 9 of 12 from the Twins last season, including four of six at Yankee Stadium. ... Wayne Tolleson and Bob Brower continued their rehabilitation Thursday in Clearwater at the Phillies complex. Tolleson was 0-for-3 and Brower was 0-for-3 with a walk. Oakland

Jose Canseco was eligible to come off the disabled list Thursday but the cast on his injured left wrist will not come off until next week. ... Dave Stewart is 9-0 in April the last two seasons. Seattle

The Mariners are 4-0 when leading after seven innings, but 0-5 when trailing after seven. Texas

The Rangers beat Milwaukee 4-2 Friday for their sixth straight victory and eighth in nine games this season. Toronto

Friday's 3-0 victory over Kansas City was played in front of an opening day record crowd of 46,028 and was the 10th win in 13 home openers for the Blue Jays.