Joseph John Sommer (November 20, 1858 – January 16, 1938) was an American professional baseball outfielder.

[1] There, they helped lead a turnaround for the Orioles in 1884, which secured the status of manager Billy Barnie.

[1] Cincinnati replaced Sommer that season by signing Browns outfielder Tom Mansell, with a $400 raise as an inducement.

[1] In 1886, Sommer set the record for the lowest single-season batting average (.209) by a player with 500 or more at-bats.

[2] In the 1880s, the New York Clipper praised Sommer as one of the strongest defensive outfielders in baseball.