It is often far easier to see managerial decisions play themselves out. It is not impossible. We had two of them in just two days that had consequences that were directly related.
When V let Repko swing away with a 3-1 count against a struggling pitcher with the bases loaded, Repko swung at ball 4. A walk there would have gotten an extra run in without question and would have seen the Sox continue the inning with only 1 out as Repko eventually went down. Not only did we not score the run but Repko became the second out of the inning.
When V left Bard in yesterday, he walked in the winning run. You can muse that Albers would have let the entire Rays team bat around but it did not matter. They only needed one run to win and they got it in a situation where Bard was clearly spent and needed to come out of the game. The Sox eventually won the game on Sunday and lost the game on Monday. However both of those decisions clearly had consequences that played into run totals. Decisions that effect run totals that directly are not hidden under the "what would have happened otherwise" possibility. Had the Rays come back and won the Sunday game we would have pointed to the lost run or runs of the Repko inning as very telling to the outcome of the game.
If the 7th inning on Monday was clean if the Rays scored no runs in that inning, and the Sox went on to win that game 1-0 then having kept the Rays off the board in the 7th would have been considered very important. In fact it was very important in that it allowed the Rays the single run they needed to win.