With 13 stamina and 45 durability, he won't be able to throw many pitches per outing, probably not much more than 15, and still bounce back in any reasonable time frame. In his last outing he threw 89 pitches, which astonishes me. Basically, you ran him well below the zero energy threshold, and it will take him some time to get his energy back up to 100%. I am a bit surprised that he is still at 0(0) 14 days later, but it can take some time to recover when guys are run down too much.