While George King was busy printing rumors about Joba’s shoulder, another Post reporter decided to ask the man himself. Joba says his shoulder is a-okay. He says he just couldn’t get loose on Sunday in Boston. There’s nothing wrong with that; it was raining and chilly. Plus, as anyone who ever participates in any athletic activity knows, some days, you just can’t get loose. There’s nothing to see here, people. Move along.