The Rams were division nemesis, but the Cowboys (First), the Packers (2nd) and the New York Giants (3rd) were the ones that kept them from winning more Superbowls ... or at least kept them from going any further in the playoffs.
Everyone remembers "THE CATCH" (1981) where the 49er's finally broke through and won their FIRST Superbowl under head coach Bill Walsh against the Cowboys.
But prior to that, the Cowboys kept them from going on in the playoffs in 1970, 1971 and 1972 under (Dick Nolan) and also in 1992 and 93 under George Seifert.
The New York Giants also put a damper on their Superbowl hopes in 1985, 1986 and 1990.
Then came the Packers in 1995, 96, 97 and 2001 with Bret Farve!
[ Edited by Kauaiguy on Nov 19, 2009 at 12:03 AM ]