Sean Gunn says he is “retired” from providing on-set motion-capture performance for Rocket Raccoon in the Marvel Studios films. Gunn, who also portrays Kraglin, says he no longer wants to do the physical work required to act as the small, contorted character during production.

Gunn describes the motion-capture process as physically taxing, saying it “hurts after a while” and that he believes he is “too old” for the role in that capacity. Both outlets note that while Rocket Raccoon is closely associated with voice work by Bradley Cooper, Gunn’s contribution centers on the movement and physical performance captured on set.

The reports focus on Gunn’s personal assessment of the demands and his decision to step back, rather than on any studio announcement about who will replace him. Neither source provides details on a timing change for future projects or confirms new performers for Rocket’s motion-capture work.