Sure, but if the highly trained medical staff clears the man to play, then he's ready to play. A bunch of people who have no idea what they're talking about saying he should "take it easy" is completely irrelavent. And the fact that he tore his ACL again has very little to do with his recovery time. It was a freak accident. You can't prepare for freak accidents. You just do the surgery, you rehab the joint, you strengthen the muscles and then when you're ready, you play. If he's ready this season, then he should play. It's not up to anyone here to decide how long a professional athlete should take to recover from an ACL tear.
Are you talking about those same people who cleared him to "play" only to have him tear it again, because he was backpedaling? Seriously, there is a reason why people with torn ACL's arent supposed to jump back into action right away.