After his first two MLB seasons, with the Boston Red Sox as an occasional back-up to Hall of Famer Carlton Fisk, Blackwell was purchased by the Philadelphia Phillies, and only got into four games during the 1976 season.
He collected two hits over those contests, spread out over eight at-bats, and would find himself playing for the Montreal Expos the following year, before finding his groove with the Chicago Cubs in 1978, who he’d play for through the 1981 season.
After two more years with the Expos in 1982 and 1983, his MLB career would come to a close, batting .228 with 238 hits in 1044 at-bats in ten seasons, generally as a back-up/platoon catcher.