Some of the details regarding the tentative terms of the five-year offer sheet that center Alex Mack will sign with the Jaguars are beginning to trickle out. Per a league source, it’s a fairly straightforward contract.

Despite speculation that the deal will include a 2015 balloon payment requiring a restructuring that Mack would do in Jacksonville but refuse to do in Cleveland, the offer sheet as currently constructed doesn’t put the Browns in a bind of that nature. It does, however, include a provision that can void the deal at the player’s election to as little as two years.

According to the source, the deal pays out roughly $18 million to $20 million over the first two years, fully guaranteed. Over three, it’s in the ballpark of $27 million, guaranteed.

The Jaguars don’t view the contract as a good deal for the team, but since the franchise currently doesn’t have many young players in which to make a major investment, they see the opportunity to lure Mack to town as a way to secure a Pro Bowl talent at an underrated position of importance to the success of an offense, and as a way to change the franchise’s perception. Whether they get Mack or not, Mack is choosing Jacksonville over Cleveland, after five seasons with the Browns.

Still, the Jaguars view their chances of ultimately getting Mack at 50-50. On one hand, the Browns could immediately match the offer, because the last thing the Browns need is another embarrassment. And if the contract pays out a full $20 million over two years and then he voids the deal and signs elsewhere, that’s still more than $5 million less that the Browns would have paid Mack for two more years under the franchise tag.