Peter Sivess (September 23, 1913 – June 1, 2003) was a Major League Baseball pitcher.

He pitched all or part of three seasons in the majors, from 1936 until 1938, for the Philadelphia Phillies.

After professional baseball, Sivess worked for a few years at Grumman Aircraft prior to joining the US Navy during World War II.

[2] He died on June 1, 2003, in Candler, North Carolina, aged 89.

This biographical article relating to an American baseball pitcher born in the 1910s is a stub.