William Pearl Rhines (March 14, 1869 – January 30, 1922) was a professional baseball player. He was a pitcher over parts of nine seasons (1890–1899) with the Cincinnati Reds, Louisville Colonels and Pittsburgh Pirates. He led the National League in ERA twice (1890 and 1896) while playing for Cincinnati. For his career, he compiled a 114–103 record in 249 appearances, with a 3.47 ERA and 743 strikeouts.

Billy Rhines
Pitcher
Born: (1869-03-14)March 14, 1869 Ridgway, Pennsylvania, U.S.
Died: January 30, 1922(1922-01-30) (aged 52) Ridgway, Pennsylvania, U.S.
Batted: Right Threw: Right
MLB debut
April 22, 1890, for the Cincinnati Reds
Last MLB appearance
June 22, 1899, for the Pittsburgh Pirates
MLB statistics
Win–loss record	114–103
Earned run average	3.47
Strikeouts	555
Teams
Cincinnati Reds (1890–1892) Louisville Colonels (1893) Cincinnati Reds (1895–1897) Pittsburgh Pirates (1898–1899)
Career highlights and awards
2× NL ERA leader (1890, 1896)

He was born and later died in Ridgway, Pennsylvania, at the age of 52. He was an alumnus of Bucknell University.