Libby umpired the September 6, 1879 game between Buffalo and
Boston. He was named to the National League umpiring staff for the 1880 season at the February league meeting. On May 22, 1880, he was called upon to umpire a game between Boston and the
Providence Grays after
Charles F. Daniels' perceived bias against Boston in the prior game led to both teams agreeing to replace him. He umpired seven more National League games that season – a three game series between
Chicago in Buffalo in
Buffalo (May 25–27), the June 19 game between Chicago and
Worcester in
Worcester, and a three-game series between Providence and Chicago in Chicago (July 5-6, & 8). He also umpired some college games that year. ==Post-baseball==