The Denver Broncos offered to add $2.5 million to the five-year, $50 million contract they proposal to left tackle Ryan Clady last year, according to ESPN.
The new offer would add $500,000 annually to Clady, who is unsigned.
Clady has a $9.828 franchise tag on him for this season. The deadline to sign franchise players to long-term deals is Monday.
The Broncos offer includes guaranteeing more than half of the contract's value.
Clady, 26, battled a right shoulder injury last year, but he only allowed one sack and had offseason surgery.