Frederick William Luderus (September 12, 1885 – January 5, 1961) was an American professional baseball player who played first base in the major leagues from 1909 to 1920 for the Philadelphia Phillies and Chicago Cubs.
Luderus was a member of the 1915 Phillies team that won the National League pennant. He was the first Phillie to hit a home run in the World Series.
He rebuilt his home in Three Lakes, Wisconsin, with the help of architect, neighbor and Phillies teammate Cy Williams.
In a 12-year, 1346-game major league career, Luderus compiled a .277 batting average (1344-for-4851) with 570 runs, 251 doubles, 54 triples, 84 home runs, 642 RBI, 414 base on balls, 429 strikeouts, .340 on-base percentage and .403 slugging percentage. He recorded a .986 fielding percentage as a first baseman. In the 1915 World Series he batted .438 (7-for-16) with 6 RBI and hit the only home run for the Phillies in Game 5.