The google quote you saw was taken from his HOF bio. I saw it as well.
here is what it says. Notice how it includes post season games.
In his 10 seasons as head coach of the 49ers, Walsh compiled an impressive 102-63-1 mark that included 10 wins in 14 postseason games. Under Walsh, the 49ers won six NFC Western Division championships and NFC titles in 1981, 1984, and 1988. His Regular season total was 92-59-1