Contract negotiations between the Denver Broncos and left tackle Ryan Clady resumed Monday with the team sweetening its offer. An NFL source said the Broncos improved their five-year, $50 million proposal from a year ago. The proposal would make Clady either the NFL's second-highest paid offensive lineman to Cleveland Browns left tackle Joe Thomas or third-highest depending on how one views Jason Peters' contract with the Philadelphia Eagles. The players union says Peters' extension is worth $12.5 million a year. But because that was tacked on to two years of an existing contract, management considers his deal worth about $10 million a year. Clady rejected the Broncos' $10 million a year offer prior to the 2012 training camp and played last season on a $3.5 million salary. Clady was eligible for free agency this year, but the Broncos greatly restricted his freedom by placing a one-year, $9.823 million franchise tag on the three-time Pro Bowler. The sides are trying to work out a multiyear contract agreement this week. If a new deal cannot be reached by July 15, Clady would have to play the 2013 season on the one-year, $9.823 million salary. The chances would then increase that Clady could leave for free agency after this season although the Broncos could hit him with a second franchise tag in 2014 with a mandatory 20 percent raise to $11.79 million.