I assume he pitched today because he has 24 hours to rest, plus about 8 more. Yesterday, he would have only had about 16 hours between outings, had he been needed today. Macha's use of his relievers is almost always setting them up to succeed. While sometimes they do the job and sometimes they don't, his obvious planning ahead and long-term use is near perfection. Then you have LaRussa, who runs out of arms in the 10th inning, yet never gets called on it.