He was nicknamed "The Mad Hatter" because of his habit of frantically tugging at the bill of his cap and re-adjusting it prior to every pitch as well as "Third Degree" for his penchant of giving up runs near the end of his career.
He was known as "The Mad Hatter" due to his habit of nervously adjusting his cap before each pitch, earning him the nickname "Third Degree" for his tendency to give up runs late in his career.