McDonald spent six years working as Allardyce's assistant with Blackburn and West Ham and is now looking to Sunderland for potential loans.
“Sam will get his feet under the table, then I'll try to get along to watch their Under-21s," he told the Blackpool Gazette. “Likewise if anyone's not in their team at the minute, we'll maybe try to pinch one or two.
“If we can find someone who suits us, then great. I'm sure Sam will be happy to help."