New Delhi: Five-time champions Mumbai Indians have come under scrutiny during the Indian Premier League 2026 after a controversial concussion substitute decision in their match against the Chennai Super Kings. The issue arose when Mitchell Santner was replaced mid-game by Shardul Thakur.
Santner sustained an injury while taking a catch off a delivery by Jasprit Bumrah, dismissing CSK batter Kartik Sharma. He was seen clutching his shoulder and left the field, prompting Mumbai Indians to request a concussion substitute. The match officials approved the replacement, allowing Thakur to take his place.
The decision quickly sparked debate, with critics questioning whether the injury met the criteria for a concussion substitute. Under International Cricket Council regulations, such substitutions are permitted only in cases of head or neck injuries, supported by medical assessment. Observers pointed out that Santner appeared to have a shoulder injury, raising doubts about the validity of the request and whether Thakur qualified as a like-for-like replacement.
Addressing the controversy, MI head coach Mahela Jayawardene stated that Santner had suffered impact to his head and neck in addition to his shoulder. He explained that the player later experienced dizziness and underwent medical evaluation, prompting the team to seek a concussion replacement.
Jayawardene emphasised that the final decision rested with match officials, who approved the substitution after reviewing the situation. He maintained that the team followed due process and acted in the player’s best interest.
Despite the high-profile replacement, Mumbai Indians failed to turn the game around, eventually suffering a heavy 103-run defeat. The incident has since intensified discussions around the interpretation and enforcement of concussion substitution rules in professional cricket.
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