The Texas Rangers will appeal a reported fine of $250,000 levied by Commissioner Peter Ueberroth for promoting pitcher Steve Howe without Ueberroth's approval, team officials said.

The major league players union will conduct an inquiry into the Howe fine, union official Donald Fehr said.

Howe, a former rookie of the year who was released by Los Angeles and Minnesota and then was suspended from the minor leagues because of drug problems, was brought up from the Rangers' Oklahoma City farm club three weeks after he was signed to a minor league contract.

The fine reportedly was levied because the Rangers violated Ueberroth's unwritten "60-90-day" rule, which calls for players with drug histories to spend 60 to 90 days in the minor leagues to prove they are drug-free . . .

Stan Musial and Moe Drabowsky, former major leaguers of Polish descent, will conduct a series of baseball clinics in Poland later this month, the office of the commissioner announced.

The clinics will be held in conjunction with the first International Cup, an amateur baseball tournament that will be played in Kutno, Poland, Sept. 25-27.

Musial and Drabowsky, who was born in Poland, will conduct one clinic in Warsaw and two in Kutno . . .

San Diego Padres president Chub Feeney and Manager Larry Bowa have been rehired for the 1988 season, Feeney announced. Feeney, the National League's president from 1970 to 1986, replaced Ballard Smith as Padres president on June 10. This season is Bowa's first as a major league manager. He played in the big leagues for 16 years before managing San Diego's farm team in Las Vegas to the Pacific Coast League title in 1986 . . .

The National League may take stricter measures against managers next year to curb the recent outbreak of doctored bats and balls, league president A. Bartlett Giamatti said in Pittsburgh. Giamatti said he has talked briefly with NL owners about "holding managers responsible for a whole range of possible infractions that might involve cheating."