9th Bob Horner, 31, announces his retirement because of a damaged left shoulder.
19th With Dave Winfield sidelined, the Yankees trade C Joel Skinner and a minor leaguer to the Indians for OF Mel Hall. Winfield will miss all of the 1989 season after undergoing back surgery next week for central disc herniation.
20th The commissioner’s office announces that Reds manager Pete Rose is under investigation for unnamed “serious allegations.”
25th The Indians and Pirates swap shortstops, with Felix Fermin going to Cleveland in exchange for Jay Bell.
28th AL umpire Nick Bremigan, 43, dies of a heart attack.
The Cubs released Goose Gossage, who will sign with the San Francisco Giants in two weeks.