On June 5, 1981, Astros pitcher Nolan Ryan surpassed Early Wynn as the all-time walk leader with 1,777 when he walked two in his 3-0 victory over the Mets. Of course, Ryan also struck out ten and only gave up five hits in that game.
Ryan would end his 27-year career with 2,795 bases on balls, nearly a thousand more than Steve Carlton, who is currently second on the career list for issuing free passes.
Nolan Ryan (Houston Chronicle)