NRL Round 12 advanced statistics – Involvement Rate

Involvement Rate is an advanced statistic for rugby league that I created to identify players who have a high workload but don’t play a lot of minutes. Traditional rugby league statistics are counting stats and volume based, and the important work of middle and interchange forwards goes largely unrecognised.

If you’re new to the site and want to understand how it works, I would recommend reading this post on Involvement Rate. To put it simply, it is a combination of Run % and Tackle % which shows the estimated percentage of plays that someone completed a run or tackle during their time on field.

Adjusting for minutes played and times helps identify those middle and interchange forwards who play with a high motor but don’t play huge minutes. Think Daniel Alvaro, Christian Welch, Blake Lawrie, Moeaki Fotuaika, Toby Rudolf and Francis Molo.

Here is the leaderboard for Inovlement Rate for Round 12, with no minutes restriction

As mentioned in the Tackle % article, the king is back. Alvaro was involved in nearly 30% of every play whilst on the field for the Warriors game against the Tigers on the weekeend. To put that number in persepective, Involvement Rate for middle and interchange forwards ranges from 19% for Props down to 17.6% for Locks, with interchagne forwards inbetween.

Next are the leaders for Involvement Rate who played 40 minutes or more in Round 12.

Jai Arrow from the Titans takes number one spot, with an involvement rate of over 23%. The Warriors Jazz Tevaga was not far behind at 23.14%, with another regular entry Christian Welch the only other player above 23% for the round.

Finally here is the season leaderboard for Involvement Rate

The big story is is that last week’s third place, Nat Butcher, played the full 80 minutes last round which has dropped his Involvement Rate by nearly 3% and all the way out of the top 20. The Titans impressive rookie Jaimin Jollife has now pushed out to a small lead at 23% over his team mate Jarrod Wallace.

Lindsay Collins has been having a fantastic season for the Roosters and sits in third, but over 1% behind Jolliffe. As mentioned above, the average involvement rate for a Prop is 19% and with only 18 players above 20% for the season shows how hard it is for players to expend high amounts of energy on both sides of the ball consistently.