Evans said earlier this week that he believes he's still a top guard in the NFL, but the contract details suggest that he could be competing for a roster spot.
It's a minimum salary benefit deal, meaning the cap charge is only $680,000. If Evans is injured before Week 1, the Seahawks can cut him and will owe him the split salary of $478,000. If Evans stays healthy and the Seahawks cut him before Week 1, he receives only the $80,000 signing bonus.
In other words, this was a low-risk move by the team.
Evans is a six-time Pro Bowler and has started 153 games in his career. But he is 32 years old and missed five games due to injury last season. Pete Carroll said the team wanted to see Evans play left guard in practice, even though he's played right guard his entire career. Because teams often keep only two backup linemen active on game days, reserves need to be able to play both sides.
Right now, there is a wide range of outcomes with Evans. It's possible that he plays well, earns a starting job, and the team tinkers with its current five-man unit, possibly moving rookie Germain Ifedi from right guard to right tackle.
It's also possible that the coaches decide Evans, at this point in his career, doesn't provide much of an upgrade, and he gets left off the 53-man roster.