MLB suspended San Diego Padres general manager A.J. Preller for 30 days without pay after an investigation into allegations the club improperly withheld information from an injury database.
MLB announced the suspension stems from a July 14 trade in which pitcher Drew Pomeranz was sent from the Padres to the Boston Red Sox.
MLB's Department of Investigations conducted a review, which included interviews with relevant individuals from both clubs.
"I accept full responsibility for issues related to the oversight of our medical administration and record keeping," Preller said in a statement.
"I want to emphasise that there was no malicious intent on the part of me, or anyone else on my staff, to conceal information or disregard MLB's recommended guidelines.
"This has been a learning process for me. I will serve my punishment and look forward to being back on the job in 30 days."
Pomeranz was traded for Anderson Espinoza, rated as one of the 20 best prospects in baseball.