Steve L. over at WasWatching points out a story at SI that suggests that Randy Johnson's shoulder troubles have more to do with his repaired knees than his shoulder.

It would be interesting to know when Johnson's last series of injections was, to gauge whether or not the lubrication is having a shorter period of effectiveness.

Yes, that would certainly be interesting to know...and if this turns out to be a recurring issue, get that man an oil change! (if it's medically all right, of course).

Seriously though, by this point, I figure that Randy knows his body and what his knees can take so if he thinks he needs another injection of fluid, he'd probably say something. My only question is the timetable of these injections. Is this a procedure where they just put a needle in there and fill up and he's good as new the next morning or is this more of a prolonged procedure? If anyone has any idea, please let me know; I'm pretty very interested in how this works now.