Daijiworld Media Network - Mumbai

Mumbai, Apr 24: Five-time champions Mumbai Indians (MI) have landed in controversy during IPL 2026 after being accused of misusing the concussion substitute rule in their match against Chennai Super Kings (CSK) on Thursday.

The issue arose after all-rounder Mitchell Santner was forced off the field following an injury sustained while taking a catch of CSK batter Kartik Sharma off Jasprit Bumrah’s bowling. The New Zealand player was seen clutching his shoulder and did not return to the field.

Mumbai Indians subsequently requested a concussion substitute, bringing in Shardul Thakur, a move that was approved by match officials. The decision, however, sparked widespread debate over whether the rule had been applied correctly and if Thakur qualified as a like-for-like replacement.

As per IPL regulations, a concussion substitute is permitted only in cases of head or neck injuries, subject to medical verification. In Santner’s case, the visible injury appeared to be to his shoulder, although the team cited neurological symptoms.

Santner was later seen in the dressing room icing his shoulder, further fuelling questions over the legitimacy of the substitution.

Responding to the controversy, MI head coach Mahela Jayawardene said Santner had suffered impact to his head and neck in addition to the shoulder injury and experienced dizziness after undergoing scans.

“He hit his head first and neck, and also hurt his shoulder. After the scan, he felt dizzy and wasn’t stable. We requested a concussion substitute, and the match referee and umpires approved it,” Jayawardene said.

He added that the final decision rested with officials, and the team followed due process in making the request.

Despite the substitution, Mumbai Indians endured a disappointing outing, suffering a heavy 103-run defeat to Chennai Super Kings.

The incident has reignited discussions around the interpretation and enforcement of concussion substitute rules in the IPL.