Buffalo's defense held Terry Bradshaw to two pass completions for three yards as the Bills beat the Pittsburgh Steelers, 13-0, in snowy, 25-degree weather today.

Both teams are 4-2 but in the last three weeks Buffalo has shut out two opponents and the Steelers have been shut out twice.

Not since 1951 have the Steelers been held scoreless twice in a season.

Roosevelt Leaks ran for a touchdown and Efren Herrera kicked two field goals to provide the points.

The Bills kept constant pressure on Pittsburgh's passers. Cliff Stoudt, Bradshaw's replacement, completed two of 10 passes for 29 yards.

Buffalo intercepted three passes and had five sacks for 29 yards in losses.

The Bills demonstrated their confidence in their defense in the third period. With a 10-0 lead and fourth and goal on the Steelers' one, they let Herrera kick a 19-yard field goal.

"At Las Vegas, they have little boy tables and big boy tables," linebacker Isiah Robertson of the Bills said. "Today we played at the big boy table."

The Steelers didn't get out of their own end until 1:29 was left in the third quarter.

Their best threat came early in the fourth quarter when they moved to the Buffalo four. But Stoudt threw an interception to Ben Williams.

Joe Cribbs of the Bills rushed 143 yards and quarterback Joe Ferguson completed 14 of 29 passes for 163 yards and two interceptions.