Brinkman (b. 1944) played in the majors from 1969 to 1974 for the White Sox and Pirates. He had 46 hits, 1 home run and a .172 batting average. He was the brother of the late Ed Brinkman.
I mailed to Brinkman on September 1 and got the card back on September 9, for an 8-day TAT.