[6] Foster returned to Worcestershire action in 1920, although for three seasons his continuing overseas business meant that his appearances remained limited.

[4] However, in 1923 he was able to play a full season, and for four years he was highly successful, scoring over 1,300 runs in each summer, making a total of ten hundreds.

In the weak Worcestershire team of that era, Roy Genders considered that he "carr[ied] the side on his shoulders".

[7] Foster was especially productive in June 1924, when he hit three centuries, and shortly afterwards was chosen for the Gentlemen against the Players at both The Oval and Lord's, albeit with very little personal success.

In this, his final first-class game, Foster both captained and kept wicket, and brought off the stumping of Ireland opener Francis Connell.