Terry Bradshaw threw two touchdown passes and Mel Blount had two interceptions to lead the Pittsburgh Steelers to a 20-6 victory today over the New Orleans Saints.

Bradshaw gave the Steelers the lead on a 16-yard pass to Lynn Swann in the first quarter, then clinched the game in the fourth period with a 47-yarder to John Stallworth. Bradshaw completed 19 of 28 passes for 276 yards. Stallworth had the best game of his career with seven receptions for 158 yards.

The Steelers (3-2), who share the AFC Central lead, led at the half, 13-3.

The Steelers scored late in the first quarter after Dave Wilson threw the first of four interceptions. They drove 48 yards in four plays with Stallworth catching three passes, including the scoring pass.

Wilson, who started because Archie Manning is injured, was intercepted by Blount three plays later, and David Trout kicked a 25-yard field goal to make it 10-0.

On the next series, the Saints (1-4) drove to the Pittsburgh nine and Benny Ricardo kicked a 26-yard field goal.

Late in the second quarter, the Saints were on the Steeler 10 with a chance to tie. But Blount intercepted again, becoming the NFL's leading active pass interceptor with 49. (Ken Riley of Cincinnati has 48).

Two quick pass completions set up Trout's 42-yard field goal.

Bob Kohrs of the Steelers had two sacks, one putting Wilson out of the game. The Steelers held George Rogers to 77 yards on 25 carries.

Wilson completed 12 of 20 passes. J.T. Thomas and Donnie Shell of the Steelers each had an interception and Shell also recovered a fumble.