I've had more knee problems than I can count. Just using ice and painkillers, I used to be able to play football again the day after a sprain. I did miss a grand total of two days with a very severe sprain once, though. Baseball players don't tend to play through pain as well as football players though. At the same time, they don't have to use their knees near so much as football players. Aramis could probably play hobbled tomorrow and not exacerbate it. If he takes 1-2 days off, he'll be at 90-95%.