That's nonsense, nothing you've heard about Ty Cobb is true. Cobb was an advocate for racial equality and spoke out for allowing black players. He learned this from his father. At the time of his death black newspapers published fawning obituaries because he had supported black players and integration.

Al Stump was a sportswriter who was working with Cobb on his autobiography, and Stump, who had been fired several times for lying, kept urging to Cobb to make up stories. Cobb refused and the book was published. Then, several years after Cobb's death Stump wrote several books and articles about Cobb claiming he had inside information and that Cobb was a racist, and violent, and intentionally tried to injure other players.

The media picked this up and all portrayals of Ty Cobb after that have used those BS biographies because they're more interesting than a guy who liked to play with his dogs and supported the integration of baseball. Pretty much everything you've heard about Cobb is complete nonsense written by a known liar who tried to make a buck off someone's death.