Mookie Wilson, center fielder for the New York Mets, was struck in the right eye by a baseball yesterday and is expected to miss the start of the season.

Wilson, 30, was hit by a ball thrown by shortstop Rafael Santana during a base-running drill. Wilson, who missed much of last season after shoulder surgery, was hospitalized at the St. Petersburg (Fla.) Medical Center.

Dr. John Olichney, a member of the Mets' medical staff, said the glasses worn by Wilson shattered on impact, causing lacerations above Wilson's right eye and blood behind the eyeball. It was not known if there was glass in the eye.

Olichney said the blood in the eye prevented determining the extent of the damage or how badly and how long Wilson's vision would be impaired. He said it would take three or four weeks for the blood to clear out.

Wilson cannot work out because of the danger of further damage, he said . . .

The Boston Red Sox, concerned by some changes in his liver and weight loss, have sent right-handed pitcher Dennis (Oil Can) Boyd to the University of Massachusetts Medical Center in Worcester, Mass., for tests.

General Manager Lou Gorman said Boyd had "lost 10 to 12 pounds," but declined to disclose Boyd's exact weight. Boyd is listed in the 1986 program as 6 feet 1 and 144 pounds.

Boyd, 26, had a 15-13 record with a 3.70 ERA in 272 1/3 innings last season . . .

The Atlanta Braves traded catcher Rick Cerone and two minor league players to the Milwaukee Brewers for catcher and first baseman Ted Simmons.

Cerone, 31, an 11-year veteran of the major leagues, batted .216 last year, his only season with the Braves. His career average is .226. Last season, Milwaukee used Simmons, 36, mostly as a designated hitter with 28 games at first base and 15 at catcher. His 15-year career average is .287 with 238 home runs.