We must look at the timing of the popularity of sports. Baseball was America's pastime through the fifties and for good reason. Once the dead ball years ended in the twenties, it was a sport married to radio, as live broadcasts filled the air. Every play was described as a one-dimensional move easily envisioned by any fan with a knowledge of the game. People could work, talk and drive with the game in the background. When television came along, the broadcasts, with limited cameras, seemed drawn out and less exciting compared to football. So, if you introduce concussion awareness in the fifties, along with earlier substitutions and play limits, you kind of water down the sport's appeal as a gladiator event. Does it make basketball, baseball and soccer more popular? Maybe. After all, not until the sixties did we see the AFL and its expansion of football into more markets and more broadcasts, culminating with a Super Bowl and the merger of the AFL and NFL.