The Stan_Williams_rsx image in the Pitchers pack shows Williams as a coach with the ca. 1975-75 Red Sox. Larry Fritch Cards currently offers a couple of images showing Williams as a coach, as well as
this one which appears to show him during his brief tenure with the 1972 Red Sox.
Looking closely, the hat he's wearing may be the red-and-blue hat used in 1975-76, but I can't tell for sure. Maybe someone better versed in B&W photos of 1970s Red Sox uniforms can give a definitive answer.