Sidney Rice won't be back with the Seattle Seahawks after all.
Cut in March and then re-signed by the reigning Super Bowl champions, Rice announced through the team Wednesday that he's retiring on the eve of training camp.
A person close to Rice, speaking on condition of anonymity because of the sensitivity of the situation, said the 27-year-old is walking away because of concussions.
"I was just thinking about things I've been through in the last few years," Rice told the team's website, which didn't specifically mention concussions. "I've hit the ground a number of times. I have quite a few injuries. It's something I've always battled through and came back from."
Rice missed the Seahawks' Super Bowl run after suffering a torn anterior cruciate ligament in an Oct. 28 in a win against the St. Louis Rams. He also had concussion-like symptoms after that game and ended the 2011 season on injured reserve after suffering two concussions in as many weeks.
The Seahawks released Rice on Feb. 28 with two years remaining on a five-year deal that included $18.5 million in guarantees, then re-signed him in April to a one-year, $1.4 million contract that included a $150,000 signing bonus.
He played 33 games with the Seahawks, recording 97 catches for 1,463 yards and 12 touchdowns. The best of his seven NFL seasons came with the Minnesota Vikings in 2009, when Brett Favre helped him rack up 83 receptions for 1,312 yards and eight touchdowns.
Rice made more than $27 million as a player. He recently opened a Wingstop restaurant in Tacoma, Wash., according to the Seahawks' website, and plans to expand that business among other endeavors.
The Seahawks report to camp Thursday, with the first practice set for Friday morning.
Follow Tom Pelissero on Twitter @TomPelissero
PHOTOS: Best shots of 2014 NFL training camps