Hadley was observed walking gingerly after the final whistle, though he managed to shake hands with opponents without visible strapping.
"Dean felt his hamstring so we have to see to what extent that is," Peters said.
Despite the medical setbacks, Hull KR secured the necessary league points by scoring 11 tries, including a hat-trick from Mikey Lewis.
>>> Spain Makes Historic Move by Excluding Real Madrid Players from World Cup Squad
"We wanted two points and got it. We're happy with that and move on," Peters said.
The opposition fielded a younger lineup that mounted a stronger defensive effort after halftime. "First half was really clinical.
Second half credit to Wigan. Their young boys came out and turned things around.
They were physical and they played well," Peters said.
The adjustments forced the coaching staff to alter their tactical rotations as the game concluded.
"It was scrappy but that can happen as we moved some people around," Peters said.
The squad successfully achieved its primary competitive objective for the round despite the unfolding injury crisis. "But we got what we wanted out of it," Peters said.
Injury issues also struck other Super League clubs during round 12 fixtures.
Warrington Wolves prop Luke Yates was ruled out for the remainder of the 2026 season with an unspecified injury, while teammate Sam Stone missed their game against Bradford Bulls due to a hamstring problem and Josh Thewlis suffered a neck issue.
St Helens forward Noah Stephens failed a head injury assessment and was hospitalized for potential neck damage following a heavy tackle against Castleford Tigers.
Deon Cross also exited that match early due to injury, while center Harry Robertson missed the fixture with a quad injury.
Leigh Leopards winger AJ Towse sustained a hamstring injury during a victory over Hull FC, who were already missing Davy Litten with a knee issue, Brad Fash with a long-term MCL injury, and Amir Bourouh due to a failed concussion test.
>>> Edmonton Oilers Reportedly Exploring Trade for Darnell Nurse
Bradford Bulls player Chris Atkin dislocated a finger against Warrington but returned to play, while teammate Ethan Ryan failed a head injury assessment in the prior round.
