CBS Sports, which may have lost as much as $100 million in the first year of its contract with Major League Baseball, has asked baseball for some of its money back.

CBS Inc. said last month that it anticipated losses in the fourth quarter of 1990, due largely to the baseball contract, and now the network apparently wants baseball to help share the loss.

"All I can say is we have had ongoing conversations with baseball on a number of issues, and until those discussions are concluded, I can't tell you very much," CBS Sports President Neal Pilson said yesterday.

However, a source close to the negotiations who commented on the condition he remain anonymous, confirmed the network had asked for a rebate on its $1.06 billion, four-year deal that began this past season.

Published reports also have said that if baseball is not willing to give CBS a rebate, the network wants more games. CBS showed only 16 regular season games in the first year of its deal; ESPN, which paid baseball $400 million for four years, showed 161. . . .

Outfielder Eric Davis, who accused the Cincinnati Reds of appearing to forget about him when he was hospitalized after a World Series injury, has been reimbursed for the cost of his medically equipped return flight, Davis's agent said.

Eric Goldschmidt said Reds owner Marge Schott authorized reimbursement of about $18,000 for the specially equipped airplane that carried him from Oakland to Cincinnati after the World Series. Goldschmidt said Reds General Manager Bob Quinn originally had declined to approve the reimbursement.