The MVP Award at the All-Star game began in 1962 when there were two games. Maury Wills and Leon Wagner were the MVPs. Neither got a Kellogg's card. Wagner's final season was 1969 so he left too soon to get a Kellogg's card. Wills' career was winding down around 1970 and his final season was 1972.
That's quite a streak of MVPs getting Kellogg's cards. Let's see how many of these players appeared in the set the year after being the game's MVP.
1985 MVP Lamar Hoyt didn't become a star until 1982 so it was a bit late for him to get into the 1983 set.