Parra is throwing a simulated game tomorrow. If everything goes well, he'll be cleared for a rehab assignment. That's some good news. As for Hart, I think some of the mental hurdles would just involve his fear of aggravating the injury. When you get an injury like that, there is always talk out there about how easy it is to aggravate it, and I know a lot of people in the media are starting to get on him about why his recovery is taking so long. I think all that is starting to get in his head, so it's piling on. I think he'll get over it, and be fine.