Eight months after they signed Matthew Stafford to a $53-million extension, the Detroit Lions are about to open up their checkbook for their quarterback again.

Stafford received a $27.5-million signing bonus when he inked his contract last July but agreed to defer $17.5 million of the payment. The balance is due Friday.

The bonus already has been accounted for on the Lions’ salary cap, and deferred payments are not uncommon for big contracts in the NFL.