On Friday 9/6/2024, EE was working on the joint saw, which involves going up and down a couple of steps quite often. By mid-day, EE reported to co-worker that their knee was starting to hurt because of the steps. Co-worker moved EE to another position. On 9/11/2024, EE told another co-worker that knee pain was still there and asked to go get it checked out at the clinic.