On this day in 1979 the Mariners released longtime major league pitcher Jim Colborn, effectively ending his major league career. Colborn had struggled with the Mariners the previous season, posting a 5.35 ERA over 20 appearances (19 starts).
Colborn spent five of his ten major league seasons as a Brewer and in 1973 he became the first 20-game winner in franchise history, going 20-12 with a 3.18 ERA over a franchise record 314.1 innings of work. He was an All Star that season and finished sixth in the AL Cy Young voting.
Colborn is still eighth on the Brewer all-time list with 1118 innings pitched and fourth with 51 complete games.