not all pitchers get rattled by base runners, but I will concede that it may play a factor. Impossible to measure. In most cases I really don’t think it makes much difference but neither of us can quantify it either way. The 82 A’s as a team, stunk, and overrated selfish Rickey got the SB record, which will never be broken. By looking at their record it’s hard to say if opposing pitchers were really affected by stolen bases, who knows they won 68, maybe they only win 64 if they don’t have Rickey. Pressure affects people in different ways. It’s possible a pitcher could pitch better with a runner on base