Orrin Robinson Casey
- Bats Right, Throws Unknown
- Height 5' 11", Weight 190 lb.
- Debut July 17, 1882
- Final Game July 24, 1882
- Born January 26, 1859 in Adolphustown, ON CAN
- Died November 28, 1936 in Syracuse, NY USA
Bob Casey was one of the earliest Canadians to play in the major leagues. He played 9 games over one week in July 1882 for the Detroit Wolverines at 23. He hit .231 and slugged a notable .410; Detroit as a team hit .230 and slugged .314. Defensively, Bob made 12 errors at third base, and that may have made the difference. Detroit tried 6 players at third that year: Art Whitney had been used in 1881, but hit poorly, and in 1882 he also hit poorly and lost his job. Joe Farrell eventually won the job, keeping it through 1884.