<!–start image–><!– end image–>Sedrick Ellis and Kristofer O’Dowd never figured to have much to do with each other. But after a preseason of relentless taunting from the senior to the true freshman, and an injury that vaulted O’Dowd to the top of the depth chart, Ellis and O’Dowd have found themselves pitted against each other every day in practice. The freshman has become Ellis’ pupil, of sort