Total Yards Added (TYA) relies on basic box-score statistics relative to the league average during the year in question. It’s broken into two components — Rushing Yards Added (RYA) and Passing Yards Added (PYA) — that are added together for the resulting TYA metric. Zero is always the league average, and positive scores indicate above-average contributions.
RYA = (Individual True Rushing Yards per Attempt – League-Average True Rushing Yards per Attempt) * Rushing Attempts
True Rushing Yards per Attempt = (Individual Rushing Yards + 20 * Rushing Touchdowns – 10 * Fumbles) / Rushing Attempts
PYA = (Individual True Passing Yards per Attempt – League-average True Passing Yards per Attempt) * True Passing Attempts
True Passing Yards per Attempt = (Passing Yards + 20 * Passing Touchdowns – 45 * Interceptions – Sack Yardage) / ( Pass Attempts + Sacks)
TYA = RYA + PYA