Don Foster, Jr. was a Starfleet officer in the 24th century.

In 2367, Lieutenant Foster was a WarpField Tech 1 for the Third Shift Antimatter Operations Unit on the USS Enterprise-D. He was listed as being on duty in the Engineering Division Duty Roster. This roster was on display via the desktop monitor in the ready room. (TNG: "Suddenly Human", okudagram)

This character was only mentioned in writing.
He was named after swing gang member Don Foster, Jr.