“Christy” (**1/2 out of four) was a sprawling but uneven biographical melodrama of Christy Martin (Sydney Sweeney) who became the most successful female boxer of the 1990’s only to be nearly undone by her husband (Ben Foster) and his controlling behavior which later escalated to attempted murder. Well-acted and overall well-told but limited in its emotional power and impact because it seems to be following a much-too-familiar mold and pattern of other sports boxing movies (“The Fighter” and “Million Dollar Baby” especially). The real-life Christy Martin is shown in stills and photographs towards the end over the closing credits.