I don't believe this is true. An official scorer can refuse to give a reliever a WIN when he qualifies, if the official scorer feels another reliever pitched more effectively. This is specifically spelled out in the scoring rules for awarding wins. However, I don't believe the same applies to saves. As long as a pitcher meets the criteria for the save, he will get it, no matter how badly he pitched. You are right about wins. When that most likely comes into play is if the starter leaves the game with the lead but fails to pitch the required five innings to qualify for a win. However, it is also true for a save under one of the qualifications, which is to pitch effectively for at least three innings. In other words, if a pitcher enters a game with a 10 run lead, pitches three innings and gives up 9 runs, the official scorer could rule that he didn't pitch effectively and therefore refuse to award a save. I believe it's automatic for the other two qualifications, but under those two if the pitcher holds the lead it's pretty much a given that means he pitched effectively.