Sharon announced her departure from America's Got Talent on Monday (August 6), accusing ABC executives of firing Jack from their new reality show Stars Earn Stripes following his multiple sclerosis diagnosis.
NBC Entertainment chairman Bob Greenblatt has since spoken out on Sharon's claims, insisting that NBC had done nothing wrong and in fact attempted to accommodate Jack in several other roles which he turned down.
"First, we have the deepest affection for Sharon Osbourne and consider her to be part of the NBC family. And our hearts go out to her, Ozzy, Jack and his family at this time," Greenblatt said in a statement.
"We hold medical information in strict confidence and therefore cannot comment specifically about Jack, but as a company that cares deeply about the health and safety of everyone on our shows - especially one like Stars Earn Stripes that requires dangerous water stunts, strenuous physical activity, and uses live ammunition - we required all potential participants to undergo medical vetting to ensure that they could safely participate."
He continued: "Although we did not ask Jack to participate in the competition, we were able to offer him two substantial alternative roles on the show, both of which he declined. This network does not discriminate on any basis."
America's Got Talent returns after the Olympics on August 14 on NBC.