Through 2019. Ranked by WAR (baseball-reference+Clay Davenport, the best WAR number that exists).
1. 1972 Chris Speier 7.25
2. 2001 Rich Aurilia 7.1
3. 1921 Dave Bancroft 6.95
4. 1937 Dick Bartell 6.85
5. 1917 Art Fletcher 6.7
6. 1922 Dave Bancroft 6.65
7. 1929 Travis Jackson 6.6
8. 1936 Dick Bartell 6.5
9. 1897 George Davis 6.5
10. 1951 Alvin Dark 6.4
11. 1928 Travis Jackson 6.3
12. 1887 Monte Ward 6.2
13. 1916 Art Fletcher 6.15
14. 1890 Jack Glasscock 6.1
15. 2015 Brandon Crawford 5.85
16. 1920 Dave Bancroft 5.85
17. 1931 Travis Jackson 5.65
18. 1927 Travis Jackson 5.45
19. 1919 Art Fletcher 5.35
20. 1930 Travis Jackson 5.15
21. 1913 Art Fletcher 5.15
21. 1913 Art Fletcher 5.15
22. 1950 Alvin Dark 4.95
23. 1918 Art Fletcher 4.95
24. 1905 Bill Dahlen 4.9
23. 1918 Art Fletcher 4.95
24. 1905 Bill Dahlen 4.9
25. 1899 George Davis 4.85
26. 1900 George Davis 4.75
27. 1975 Chris Speier 4.6
28. 1904 Bill Dahlen 4.65
28. 1904 Bill Dahlen 4.65
29. 1901 George Davis 4.6
30. 1952 Alvin Dark 4.5
31. 1909 Al Bridwell 4.5
32. 1953 Alvin Dark 4.45
33. 1938 Dick Bartell 4.45
32. 1953 Alvin Dark 4.45
33. 1938 Dick Bartell 4.45
34. 1914 Art Fletcher 4.4
35. 1908 Al Bridwell 4.3
36. 1954 Alvin Dark 4.2
36. 1954 Alvin Dark 4.2
37. 2016 Brandon Crawford 4.15
38. 1958 Darryl Spencer 4.15
39. 1926 Travis Jackson 4.1
40. 1923 Dave Bancroft 4
39. 1926 Travis Jackson 4.1
40. 1923 Dave Bancroft 4
41. 1941 Billy Jurges 3.7
42. 1911 Art Fletcher 3.7
43. 1974 Chris Speier 3.65
44. 1934 Travis Jackson 3.65
45. 1915 Art Fletcher 3.65
46. 1939 Billy Jurges 3.55
47. 2014 Brandon Crawford 3.5
48. 2009 Juan Uribe 3.5
44. 1934 Travis Jackson 3.65
45. 1915 Art Fletcher 3.65
46. 1939 Billy Jurges 3.55
47. 2014 Brandon Crawford 3.5
48. 2009 Juan Uribe 3.5
49. 1924 Travis Jackson 3.5
50. 1944 Buddy Kerr 3.3And the worst shortstop season in Giants history: 1982 -2.05 Johnnie LeMaster
