Stoneman (b. 1944) played in the majors from 1967 to 1974 for the Cubs, Expos and Angels. He had a career record of 54-85 with 934 strike outs and a 4.08 ERA. He was an All Star in 1972 and finished 8th in the NL Cy Young race in 1971.
Stoneman also was the GM of the Angels when they won the World Series in 2002.
I mailed to Stoneman on July 30 and got the card back on August 8, for a 9-day TAT.