Photo source: Wikimedia Commons, Heritage Auctions
This post is a list of baseball hitters with at least .500 on-base percentage a season in the MLB as of May 16th, 2020. There are 19 seasons listed below. The photo above is Mickey Mantle in 1951. Data source: Baseball-reference.com
1. Barry Bonds (2004) - .609
2. Barry Bonds (2002) - .581
3. Ted Williams (1941) - .552
4. John McGraw (1899) - .547
5. Babe Ruth (1923) - .544
6. Babe Ruth (1920) - .531
7. Barry Bonds (2003) - .529
8. Ted Williams (1957) - .525
9. Billy Hamilton (1894) - .520
10. Babe Ruth (1926) - .515
11. Barry Bonds (2001) - .515
12. Babe Ruth (1926) - .512
13. Babe Ruth (1921) - .512
14. Mickey Mantle (1957) - .512
15. Rogers Hornsby (1924) - .507
16. John McGraw (1900) - .504
17. Joe Kelley (1894) - .502
18. Hugh Duffy (1894) - .501
19. Ed Delahanty (1895) - .500
