Staley had four years left on his contract, and the extension will add two more onto that. He was set to make $2.7 million in 2014, which will likely change with the new deal.
Staley, who has spent all of his seven-year career with the 49ers, made the Pro Bowl each of his last three seasons.
Staley's extension comes while two of his teammates considering holding out in training camp to get new deals of their own. Offensive guard Alex Boone and tight end Vernon Davis are both known to be seeking new contracts, and both could miss the beginning of training camp next week.
49ers general manager Trent Baalke released a statement on the extension:
"In today’s NFL, it is rare for a player to play his entire career with one team. With this extension, Joe will likely be a 49er for life. He is a three-time All-Pro and core member of our football team. His commitment and professionalism have been great assets to our team and our community. This extension reflects our philosophy of investing in our core players."
- Alex Hampl