This is an average and generally somewhat interesting film biography of baseball pitcher Grover Cleveland Alexander, whose life does provide plenty of material for a movie. Although the portrait of Alexander is somewhat stylized, it is relatively straightforward in bringing out the less admirable events in his life. Overall, it follows the usual formulas for such films, with a reasonable degree of success.
Ronald Reagan gives a solid if unspectacular performance as Alexander, with Doris Day as his wife giving it a little more energy. The supporting cast is decent, with Frank Lovejoy probably getting the best opportunities as Rogers Hornsby, although the character takes some noticeable liberties with the Hornsby of baseball history. There are also numerous other factual inaccuracies about the players, stadiums, and so forth. In this respect, it's somewhat interesting as a contrast to many recent biographical movies.
Recent movies sometimes make better efforts to get the minor details right, but then they often distort the larger picture to promote a pet view of history or of a historical character. Older biographies like "The Winning Team" might be more likely to change factual details to fit a dramatic story, but less likely to distort the broader view of events.
Regardless of all that, this is a reasonable picture, without many significant strengths or flaws. It's probably mostly of interest to baseball fans or to those curious to see Reagan's role.