Arian Foster tweeted an MRI of his hamstring injury Wednesday, and assures that he'll be "fine."ESPN's John Clayton quickly jumped to the conclusion that Foster wouldn't be ready for Week 1 after viewing the MRI, but we didn't know Clayton has a medical background. "If I had a 'significant injury' why post it?" Foster then tweeted. "I'll be fine, it was just meant to make fun of the whole situation. Humor is lost nowadays." There have been rumors that Foster has a torn hamstring, but nothing to confirm them. Foster doesn't seem worried, and the Texans wouldn't be letting him run on the side of practice with a muscle tear.Read the LAST SENTENCE, and then stop complaining.