Knight (b. 1952) played in the majors in 1974 and from 1977 to 1988 for the Reds, Astros, Mets, Orioles and Tigers. He had 1,311 hits, 84 home runs and a .271 batting average. He was an All Star twice (1980 and 1982) and his best MVP finish was 5th in 1979 (NL). He was the World Series MVP in 1986 with the Mets. Of course, the Mets won that World Series.
Knight also managed the Reds in 1996, 1997 and 2003 to a record of 125-137 (.477 win %).
I mailed to the private signing on September 5 and got the card back on October 13, for a 38-day TAT.