William Robert Baker (born November 29, 1956) is an American former professional ice hockey defenseman who played 143 regular season games in the National Hockey League (NHL) for the Montreal Canadiens, Colorado Rockies, St. Louis Blues and New York Rangers between 1980 and 1983.

Baker is best known for being a member of the Miracle on Ice 1980 U.S. Olympic Hockey Team that won the Gold Medal in Lake Placid, NY.

Baker's jersey from the famed "Miracle On Ice" is on display at the Smithsonian in Washington, D.C., U.S. along with a stick autographed by all the members of the team.

He spent the 1983-84 season in the CHL playing for the eventual league championships, the Tulsa Oilers coached by Tom Webster.

[2] In a 1981 TV movie about the gold medal-winning hockey team entitled Miracle on Ice, Baker is played by David Wallace.