Herron left the field during Friday’s warmups with an injury and was placed on IR. He had signed as an injury replacement for Dan Skipper and had been in the mix for backup tackle/guard duties, contributing to Detroit’s internal depth conversation.

Herron’s injury scenario created extended reps for Manu, highlighting the importance of the Lions’ depth and Manu’s ability to translate practice growth into live reps. Herron’s absence underscored the learning curve Manu faces when forced into more consequential blocks and decisions.