The Ram's Games Shown in 'The Split'
First game is versus the Falcons on Sunday, December 3, 1967. At one point you can hear an announcer say the Rams have won 20-3. That was the actual final score, but the all players' names you hear on the soundtrack are ficticious.
Second game is against the Packers on Saturday, December 9. The Rams, needing a win to force a showdown with the Colts the following week, pulled it out in the final minute, 27-24. They went on to beat the Colts, but then lost to Packers in the first round of the playoffs.
Since the producers needed footage from two games they probably chose these because it was the first time that season the Rams were home on consecutive weeks. They would have been able to do some other filming on site during the week and wrap the whole location shoot in seven days.