Five substitutes helped big squads, it never helped tired players

The rule arrived dressed as a welfare measure and quietly became the most effective competitive advantage money can buy.

The argument for five subs was medical. Congested calendar, compressed fixtures, players breaking down, so give managers more ways to protect legs. Reasonable premise. The problem is that a rule letting you replace five players only helps if the five coming on are as good as the five going off.

For a squad with genuine depth, the last twenty minutes became a fresh team against a tired one. Two attackers on, a runner in midfield, and the opposition fullback who has been hanging on since the hour mark now has to defend somebody who has been sitting in a coat. That is not a welfare mechanism. That is a structural edge. For a squad without depth, the manager either makes changes that weaken the side or does not make them at all, in which case his players get the exact same workload they had before, minus the theoretical protection.

You can see it in when goals arrive. Late goals were always disproportionate, tired defending being what it is, but the distribution has skewed further into the closing fifteen since the change. The side with the better bench closes games out or steals them. The gap widens.

There is a tactical layer under this. Five subs made high-intensity pressing viable across a full season, because a system that burns a midfielder out by the seventieth minute is fine if you have another midfielder who can do seventy minutes of it. Coaches now design pressing schemes explicitly to be run by two shifts of players. A squad of eighteen professionals and a couple of academy kids cannot do that.

My view is the rule is defensible but the framing was dishonest. If the concern is welfare, the lever is the fixture list, not the bench. Fewer matches, an actual off-season with weeks in it rather than days, a cap on competitive minutes per player per calendar year. All painful, all costly to broadcasters, which is precisely why we got a substitution rule instead.

And if we are keeping five, at least tighten the windows. Restrict how many can be used before the seventieth minute. Something that makes it harder to refresh an entire attacking unit at will while the other manager watches.

Otherwise we have written the depth of your wage bill directly into the laws of the game and told everyone it was about looking after the players.