The Carolina Panthers have officially placed RB Jonathon Brooks on injured reserve. Most outlets report Brooks suffered a groin injury, though CBS Sports specifies the placement stems from core muscle surgery. Brooks is expected to miss between four and six weeks, per reporting.

Brooks, 23, has appeared in just five games over the last three seasons. The Panthers filled his roster spot by promoting S Isaiah Simmons to the 53-man roster and adding LB Maema Njongmeta to the practice squad, per NFL Trade Rumors.

In response to the injury, the Panthers have scheduled a workout with veteran RB Austin Ekeler, the 31-year-old former All-Pro. No deal has been announced.