Steven Francis Frey (born July 29, 1963) is an American former professional baseball pitcher, who played in Major League Baseball (MLB) for the Montreal Expos, California Angels, San Francisco Giants, Seattle Mariners, and Philadelphia Phillies, from 1989 through 1996.

Frey attended William Tennent High School in Warminster, Pennsylvania, and played three seasons of college ball at Bucks County Community College before being drafted by the New York Yankees in the fifteenth round (379th overall) of the 1983 Major League Baseball draft.

On December 11, 1987, he was traded with catcher Phil Lombardi and Darren Reed to the New York Mets for Rafael Santana and Victor Garcia.

After one season with the Tidewater Tides, he was traded to the Montreal Expos for Mark Bailey and Tom O'Malley.

Unable to agree on a contract for 1994 with General Manager Whitey Herzog, Frey signed with the San Francisco Giants.