Offseason
- October 13, 1958: Maury Wills was sent to the Tigers by the Los Angeles Dodgers as part of a conditional deal.
- November 20, 1958: Billy Martin and Al Cicotte were traded by the Tigers to the Cleveland Indians for Don Mossi, Ray Narleski, and Ossie Álvarez.
- December 1, 1958: Lou Skizas was drafted from the Tigers by the Chicago White Sox in the 1958 rule 5 draft.
- Prior to 1959 season: Andy Kosco was signed as an amateur free agent by the Tigers.
Read more about this topic: 1959 Detroit Tigers Season