They played in one post season game which the Rams won.
Below is three games they played. The 1979 and 1984 regular season meetings. And the 1975 playoff game.
In this 1984 regular season game, the Cardinals were on a 4 game winning streak and had the Rams in St. Louis.
St. Louis got out to a 13-0 halftime lead.
But, in the second half things changed.
First, QB Jeff Kemp hit Ron Brown on a 50 yard touchdown strike.
Dickerson averaged over 10 yards a carry totaling over 200 plus yards for the day.
1979 RAM SEAHAWK GAME 1979 RAM DEFENSE SHINED ALL DAY
In this 1979 regular season meeting. The Los Angeles Rams defense held the St. Louis Cardinal offense to just 43 total yards in the first half.
Jack Youngblood led the charge with two sacks and a fumble recovery. Not to mention him harrassing Hart all day.
Ram reserve QB Vince Ferragamo got into the act with a third quarter scoring pass to Billy Waddy.
The Rams rushed for over 220 yards compared to the Cardinals 88 yards.
This 21-0 win would be one of three ahutouts in the 1979 season.
1975 PLAYOFF GAME
The 12-2 Rams and 11-3 St. Louis Cardinals met in the first round of the 1975 playoffs.
The Rams defense was number one in the NFL in 1975, allowing just 135 points for the season.
The Cardinals under Don Coryell, had the number two offense in the league. Also, their offensive line only allowed 8 sacks for the entire season.
Coach Chuck Knox didn't decide who would be QB until game day. To the surprise of many, he went with Ron Jaworski instead of James Harris.
On the first series of the game, the Rams went 79 yards (51 yards by Lawrence Mccutcheon) that was capped off by a bootleg by Jaworski that gave the Rams a 7-0 lead.
On the Cardinals second offensive play, Jim Hart's pass was intercepted by Jack Youngblood who ran it back for a 47 yard TD making it 14-0 Rams.
On the first play of the second quarter, Bill Simpson intercepted his first of two taking it all the way back for a TD making the score 21-0 Rams.
The Cardinals finally got on the board as Jim Otis took it in from the 3 yard line,but, Jack Youngblood blocked the extra point making it 21-6 Rams.
But the Rams didn't waste any time getting back that TD as Jaworski connected with Harold Jackson on a 50 yard TD strike. At the half, the Rams had a 28-6 lead.
The second half saw the Rams run the ball as Mccutcheon rushed for then a NFL playoff record of 202 yards on 37 carries.
The final score was 35-23 Rams.
Jack Youngblood was named player of the game as he recorded one sack, one forced fumble,one blocked extra-point attempt and returned an interception 47 yards for a touchdown.
But the real reason for this come from behind win was the defense, led by Jack Youngblood.
In the second half they shut down the Cardinal offense.
St. Louis went scoreless in the second half.
Just like Youngblood was the hero 9 years earlier in 1975, he was again. Sacking the Card QB 3 times and blocking the game tying FG at the end of the game