As a college football player for the Penn Quakers football, he was named to the 1904 College Football All-America Team as a consensus pick. In 1903, he was a third team All American. He was among the first Polish-Americans to gain recognition in college football. He was head coach of Washington & Jefferson football from 1905 to 1907, amassing a record of 25-7. He was also a lawyer; in 1933, he became a judge in Allegheny County, Pennsylvania. Piekarski died in 1951 at Pittsburgh Hospital in Pittsburgh. In 2005, he was named to the National Polish-American Sports Hall of Fame.