All-time single-season leaders in stolen base-walk ratio (minimum 100 plate appearances):

1) Infinity Gus Getz, 1916 Brooklyn Robins: nine steals, zero walks
2) 12.0 Joe Cannon, 1979 Toronto Blue Jays: 12 steals, one walk
3) 8.0 Dee Gordon, 2011 Los Angeles Dodgers: 16 steals, two walks

Dedicated pinch-runner Herb Washington has the most steals in a season without a walk: 29.

Source: Baseball-Reference.com.