Referee Card Statistics: Who Books the Most?
D. England: 4.72 yellow cards per game over 18 fixtures — the highest average among 16 qualifying referees in six leagues. Data to 5 November 2026.
Form (recent form) explained
Form is a team’s recent run of results or performances, typically the last five or six matches.
In-play win probability explained
In-play win probability is a live estimate of each result’s chance that updates continuously with the score, the clock and the match situation.
Goals prevented (GK) explained
Goals prevented compares the goals a keeper actually conceded with the post-shot expected goals (xGOT) of the on-target shots faced.
Expected threat (xT) explained
Expected threat values every location on the pitch by the chance that having the ball there eventually leads to a goal, then credits passes and carries by…
Ensemble model explained
An ensemble combines several different models into one forecast — averaging them, weighting them by recent skill, or letting one correct another.
Overfitting explained
Overfitting is when a model learns the quirks of its training data rather than the underlying pattern, so it looks brilliant in back-testing and falls apart…
Log loss explained
Log loss scores a probabilistic forecast by the logarithm of the chance it gave to what actually happened.
Brier score explained
The Brier score measures forecast accuracy as the mean squared error between stated chances and outcomes.
Reliability curve explained
A reliability curve plots predicted probabilities against how often those predictions actually came true, in buckets.
Sample size explained
Sample size is the amount of evidence behind a number.
Home advantage explained
Home advantage is the systematic edge teams gain at their own ground, historically worth roughly a third to half a goal per match in Europe’s top leagues.
Strength of schedule explained
Strength of schedule measures how difficult a team’s fixtures have been, usually as the average rating of the opponents faced.
Pythagorean expectation explained
Pythagorean expectation estimates the points a team “should” have from its goals scored and conceded, using a power formula borrowed from baseball and tuned…
Game state explained
Game state is the scoreline context in which statistics are produced — leading, level or trailing.
Set-piece xG explained
Set-piece xG is the share of a team’s expected goals generated from corners, free kicks and throw-in routines rather than open play.
Shot-creating actions (SCA) explained
Shot-creating actions credit the last two attacking involvements before a shot — passes, dribbles, fouls drawn or rebounds.
Per-90 statistics explained: a plain-English guide
Per-90 statistics explained, explained in plain English with worked examples from real fixtures and TACTIX's own graded predictions.
Possession-adjusted stats explained
Possession-adjusted statistics rescale counting stats such as tackles and interceptions to a common share of time spent defending, so players in dominant…
Packing explained
Packing counts how many opponents a pass or dribble takes out of the game — the number bypassed between the ball’s start and end point.
Progressive passes explained
A progressive pass moves the ball substantially closer to the opponent’s goal — data providers typically require around ten metres of progress towards goal,…
Field tilt explained
Field tilt is a team’s share of the match’s final-third possession: its attacking-third passes as a percentage of both sides’ combined attacking-third passes.
PPDA (passes per defensive action) explained
PPDA counts how many passes the opposition completes before the pressing team makes a defensive action — tackle, interception, challenge or foul — usually…
Non-penalty xG (npxG) explained
Non-penalty xG is expected goals with penalties removed.