CA to trial injury subs with tactical twist in Sheffield Shield with eye to Test cricket use

Cricket Australia will trial an injury replacement rule in the first five rounds of this season's Sheffield Shield competition, and allow the opposition to make a corresponding substitution, with a view to passing on the findings to the ICC as discussions continue about the introduction of injury substitutes in Test cricket.

CA has communicated with the six state teams in recent weeks, outlining the details of the rule which will be implemented across the first half of the season, which starts on Saturday. It will differ significantly from the "serious injury replacement substitute" rule the BCCI has brought into India's domestic first-class competition recently.

The Australian version has been designed with the aim of covering all injuries, preventing fit fast bowlers from being overloaded for the remainder of the match if they lose a fast-bowling mate early in the game, and to maintain competitive balance within matches while trying to avoid any manipulation.

Currently, teams can make unlimited concussion substitutions across all four days of a Shield game - and that will remain unchanged - but under the trial there will be an additional like-for-like injury replacement available to both teams up until stumps on day two.

Teams will be allowed to replace any player with another player of the same skill set (for example, a fast bowler for a fast bowler, a batter for a batter, a spinner for a spinner) as a result of any injury or illness that has occurred from any point after the toss. Teams will need to make a request to the match referee, who will determine the legitimacy of the injury and approve the replacement.

This differs from the BCCI rule, which dictates the injury has to have happened during the game and needs to be external (like taking a blow resulting in a deep cut or fracture) rather than internal (like a hamstring strain).

The issue was in the spotlight during the recent England-India Test series where both sides had players suffer significant external injuries: Rishabh Pant with a fractured foot at Old Trafford and Chris Woakes with a dislocated shoulder at The Oval.

An interesting element to what CA is introducing is the ability for the opposition to match a substitution. If a team uses the injury replacement rule, the opposition will be allowed to bring in a "tactical substitute" in response by the close of day two. But that substitute must be the same type of player as was injured in the opposition.

For example, in the round one clash this week between Western Australia and New South Wales at the WACA ground, if a WA fast bowler was injured and was replaced by another WA fast bowler, NSW could make a tactical substitution but could only swap out a fast bowler for a fast bowler. They could not make a tactical substitution like swapping a batter for a batter because of form in the first innings.

The match referee can also put restrictions on the involvement of both replacement players. A batter may be instructed that they cannot bowl if they are replacing a batter who does not regularly bowl. The replacement players also automatically inherit any warnings that have been imposed on the replaced player, such as for running on the pitch.

Another key element is that in the case of the player who is ruled out through injury or illness, they will undergo a mandatory 12-day non-playing period that starts from the second day of the match that they were subbed out of.

This means that if a player were to be replaced for injury in the first two days of round one, their non-playing period would start from October 5, meaning they would not be eligible to play in the One-Day Cup matches on October 9 or the second Shield round, which begins on October 15.

There is a slight wrinkle for the states to manage in that teams will only initially be permitted to travel with 12 players, as has been the norm in Australian domestic cricket for many years, with the exception being Western Australia or teams travelling to Western Australia due to the length of that flight and the difficulty in getting other reserve players there on short notice. WA, when they travel interstate, and teams who travel to WA, are permitted to have a squad of 13.

Teams who are playing away from home on the east coast will be able to fly an injury replacement in at short notice if needed on the first two days of a game if the 12th man is not a like for like. The states have been encouraged to carry a spare fast bowler as the 12th player on most occasions as the majority of replacements will be to fast bowlers based off the injury data CA has used to help form this new rule. CA wanted to avoid teams carrying large squads unnecessarily.

The ICC has agreed that all matches during the trial period will retain first-class status. During the first five rounds, CA will be sourcing feedback from the states on the success of the trial and it is leaving open the possibility of continuing it further into round six and or round seven. CA will also look at potential alterations to the trial from round seven onwards or cancelling it altogether.