The Office of the Commissioner of Baseball announced today that San Francisco Giants Minor League pitcher Luis Custodio, who is currently on the roster of the Dominican Summer League Giants Black, and free agent Minor League pitcher Luis Sierra have each received a 56-game suspension without pay after testing positive for Stanozolol, a performance-enhancing substance in violation of the Drug Prevention and Treatment Program for Minor League Players Assigned Outside of the United States and Canada.
The suspension of Custodio will be effective at the start of the 2026 DSL season. The suspension of Sierra will be effective upon his signing with a Major League organization.