Walker had a long career in theater,[1] eventually rising to appear in Broadway productions, beginning with 1915's Sinners, which was written by Pulitzer Prize-winning playwright, Owen Davis.

The play was directed by William A. Brady, and also starred his daughter, Alice Brady, as well as Tony Award-winning actor John Cromwell[2] From 1915 through 1930 he would appear over a dozen times on the Great White Way,[3] with some of his more notable plays being An American Tragedy, taken from the best-selling novel of the same name by Theodore Dreiser,[4] and Holiday, produced and directed by Arthur Hopkins.

He appeared in his last Broadway production in 1930, with a featured role in Rebound, written by Academy Award winner, Donald Ogden Stewart.

[13] Walker's final screen appearance in a feature film was in a supporting role in The Cowboy and the Lady, starring Gary Cooper and Merle Oberon in 1938.

[14] Walker died of pneumonia[15] at age 83 on December 4, 1947, in St. Francis Hospital in Honolulu, Hawaii, where he had been visiting his daughter and son-in-law.