Dierker (b. 1946) played in the majors from 1964 to 1977 for the Colt .45s/Astros and Cardinals. he had a record of 139-123 with 1,493 strike outs and a 3.31 ERA. He was an All Star twice (1969 and 1971) and won 20 games in 1969.
Dierker managed the Astros from 1997 to 2001 compiling a record of 435-348 (.556 win %). He was the NL Manager of the Year in 1998. He appeared on the 1983 Hall of Fame ballot, but received no votes.
I mailed to Dierker on October 5 and got the cards back signed on November 23, for a 49-day TAT. I paid a fee of $5/card.