Funky sideburns grown by straitlaced Boston Red Sox icon Carl Yastrzemski prior to the 1973 season. A turning point in America's long cultural war between “hairs” and “squares,” Yaz’s decision to grow muttonchops gave thousands of clean-cut kids all over New England permission to let their freak flags fly. By the end of the year, long hair, sideburns, wide collars, and bell bottoms had become the de rigeur off-the-field look for players across baseball. Decades later, Yaz’s righteous whiteboy ‘chops were still being namechecked by popular culture. In a May 1991 episode of The Simpsons, Bart’s friend Milhouse wants to spend $30 on a Carl Yastrzemski baseball card from 1973 "when he had big sideburns," but Bart and Martin convince him to go in with them on a copy of Radioactive Man No. 1 instead.