Remy Peter "Ray" Kremer (March 23, 1895 – February 8, 1965) was an American professional baseball player.

Ray attended Polytechnic High School in Oakland, playing in semiprofessional baseball leagues while still a student.

He was expected to enter the metalworking trade like his father and brothers, but opted to continue playing baseball instead.

He pitched five complete games to begin his major league career and posted an 18–10 record as a rookie in 1924, then followed that with seasons of 17–8, 20-6 and 19–8.

Kremer put up some of the most impressive numbers of his career in 1930, leading the league in wins (20), games started (38) and innings pitched (276).

After being waived by the Pirates, Kremer played two more short stints with the Oakland Oaks in 1933 and 1934 before retiring from baseball.