<p>For a biographical drama to work, it&#8217;s not required that the central actor do a pinpoint uncanny, so-close-to- the-real-thing-you-might-think-it’s-the-real-thing impersonation of the person he&#8217;s playing. But Peter Farrelly’s &#8220;I Play Rocky&#8221; may be a special case. It&#8217;s a </p>