Here Come the Tigers (1979)

Rookie cop Eddie Burke (Richard Lincoln) doesn't know much about baseball, but, when the town police captain goes nuts, Eddie finds himself saddled with the responsibility of coaching the captain's hopelessly inept team of Little Leaguers. Helped by his partner, Bert (James Zvanut), Eddie struggles to get the team into shape, but soon realizes he needs to bring in some ringers. Luckily, a first-rate batter (Ted Oyama) just moved to town, and a new pitcher (Philip Scuderi) turns up as well.