Henderson (elbow) was activated Tuesday from High-A Wisconsin's 60-day injured list and was assigned to Single-A Carolina.
Henderson, a 2021 first-round pick, didn't make his professional debut until earlier this month after he required an elbow procedure this spring. He made two appearances in the rookie-level Arizona Complex League before ultimately settling in the Carolina League. He tossed two scoreless innings for Carolina on Tuesday, striking out three while allowing two hits and no walks.