Harry William "Hal" Krause (July 12, 1888 – October 23, 1940) was an American Major League Baseball player.

He led the American League in earned run average in 1909 while playing for Philadelphia.

He had arm trouble early in 1910 which forced him to miss some time, but pitched well enough in 1911 that he was considered for use in the 1911 World Series, although he wasn't needed.

[3] The 1912 Reach Guide credits him with helping carry the pitching burden for the 1911 team while stars Jack Coombs and Chief Bender were less effective than usual early in the season.

[4] In 1912, he came down with a sore arm, pitched badly in six games, and then went to the minor league Toledo Mud Hens.

He continued to pitch well for the Oaks over the next decade, becoming a fixture in the starting rotation and winning over 20 games two more times.