Ben "Mark Prior" Sheets Is Injured (Again)

According to MLB.com, Ben Sheets has a torn flexor tendon. Apparently, Sheets, prior to his Rangers physical, was unaware that his elbow was entirely fucked up -- so fucked up that it is going to require surgery. Meanwhile, the Brewers medical team found no such injury when Sheets was "inspected" back on December 8. So either sometime in the past 60 days, Sheets blew out his elbow not pitching and didn't tell anyone (in which case he's an asshole) or the Brewers knew something was wrong and didn't tell him (in which case the Brewers are a bunch of assholes). Of course, there is also the possibility that the Brewer's medical examiner is Dr. Nick Riviera. Somehow, however, I doubt an $80+ million team would hire shitty doctors to monitor and examine their players.

I have questions and demand answers:

1) If this injury, which is a serious one, was prevalent enough to not only be discovered by the Rangers, but also require surgery, how did the Brewers never catch it? Something here seems fishy.
2) If the Brewers DID know about the injury, why did they offer Sheets arbitration?
3) Should the Brewers be held responsible for paying for Sheet's injury if they were aware of the injury (which often requires expensive surgery to fix) and did not inform Sheets of it?
4) Did the Brewers know about the injury and hide it from Sheets because they knew a healthy Sheets would turn down their offer of arbitration and they wanted an extra first round draft pick?
5) If Sheets knew he was injured, wouldn't he have accepted the Brewers offer of arbitration? You know, so he'd get paid and not have to shell out the surgery money himself?
6) What could Sheets have possibly done to blow out his elbow in the past 60 days?

Something seems fishy here...