DRAVECKY UPDATE: Former Giants pitcher Dave Dravecky is having daily radiation treatment to his left arm in an effort to avoid amputation.

The therapy was started Monday and will be continued for about two weeks, a Cleveland Clinic spokesman said.

Dravecky pitched eight years in the majors before a tumor was discovered in September 1988. After major surgery, he returned in 1989, winning two games. But his arm broke Aug. 15 while he was pitching and again Oct. 9 during the Giants' NL championship celebration. He had cancer operations Jan. 4 and in May and a subsequent analysis indicated another tumor had developed.

RUMOR MILL: The Royals are exploring the possibility of trading all-star OF Bo Jackson and LHP Mark Davis to the Padres for CF Joe Carter, the Los Angeles Times reported.

Royals GM John Schuerholz and Jack McKeon, Padres manager and vice president of baseball operations, confirmed the clubs have talked about a potential trade but said nothing is imminent.

PESKY'S BACK: Former Boston Red Sox great Johnny Pesky has taken over as manager of their AAA Pawtucket (R.I.) farm team. Pesky, 70, replaced Ed Nottle who was fired as manager Tuesday night after 4 1/2 seasons. He will manage the club for the rest of the season. . . . The Indians called up RHP Charles Nagy from Class AA Canton-Akron to replace RHP John Farrell (disabled list, tendinitis) on the roster. . . . The Cardinals have agreed to terms with top draft pick LHP Donovan Osborne, 21, out of Nevada-Las Vegas.