Billy Sunday was a prominent American evangelist in the early 20th century. A former professional baseball player, he left sports in the 1890s to become a fiery preacher known for his energetic, theatrical sermons. Sunday traveled across the U.S., drawing massive crowds with his passionate calls for repentance and moral living. He was a staunch supporter of Prohibition and conservative Christian values. Though not formally trained in theology, his charisma and plainspoken style resonated with many. His revival meetings played a key role in shaping American evangelicalism, making him one of the most influential religious figures of his time.