ATLANTA (AP) _ Several times in recent weeks, Atlanta right-hander Steve Bedrosian has pitched well, only to fail to get a victory or worse, to get saddled with a defeat.

Sunday against the San Francisco Giants, Bedrosian pitched well and got credit for 4-1 triumph.

''I learned when I was in the minor leagues that you can't pout when the team doesn't get you any runs or makes errors,'' said Bedrosian, who went six innings, scattering five hits and striking out six and walking just one.

It was Bedrosian's seventh strong outing in his last eight starts and he attributes his improved performance to a new pitch.

''I always had a fastball and a slider,'' said Bedrosian, ''and now that I have developed a decent changeup, it has really helped me.''

There has been recurring speculation that Bedrosian would be returned to his earlier role as a reliever, but Atlanta Manager Bobby Wine said a change would not be made.

''Based on his work today, he definitely will have to continue to be one of our starters.''

Bedrosian also impressed San Francisco Manager Jim Davenport.

''That's as good as I've ever seen him throw,'' Davenport said.

Bedrosian, 7-12, escaped two early jams as the Braves won for only the second time in their last eight games. Bruce Sutter pitched the last two innings for 23rd save.

Roger Mason, 0-1, making his National Legaue debut, was the loser.

Dale Murphy led off the Atlanta fourth with a walk and took third on Gerald Perry's single. Claudell Washington singled home Murphy, and Ken Oberkfell doubled in Perry. An RBI grounder by Bruce Benedict capped the three-run inning.

Jeff Leonard singled home San Francisco's run in the sixth before Perry doubled in the seventh for his third hit of the game and scored on Washington's single.