The 49ers have committed to making Alex Boone their top backup at offensive tackle for the next four seasons. As first reported by NFL.com, the 49ers extended Boone's contract last month until 2015 and gave him a $1.7 million signing bonus. Boone's contract was set to expire at the end of the league year at which point he would have been an exclusive rights free agent.
Boone went undrafted out of Ohio State in 2009 largely because of character concerns stemming from alcohol abuse in college. He signed with the 49ers that year because he thought Mike Singletary's tough-love approach would be good for him. Boone has re-dedicated himself to his craft since then, including losing close to 40 pounds before the 2010 season.
"We are very pleased with the progress that Alex has made since joining the team in 2009," general manager Trent Baalke said in a press release. "He really is a great example of what hard work, dedication and focus can do to further a young player's career. The 49ers are very happy for Alex and look forward to him capitalizing on this opportunity."
Boone was on the practice squad as a rookie. Last year he was promoted to the 53-man roster. He solidified his spot as the team's top backup offensive tackle this year and has been part of the 49ers' heavy jumbo packages that incorporate extra offensive linemen. Starting offensive linemen Anthony Davis and Joe Staley are signed through 2014 and 2017 respectively.
According to league sources, the 49ers have attempted to re-sign a host of players whose contracts expire after either this year or next. They include outside linebacker Ahmad Brooks (2011), linebacker Larry Grant (2011), defensive lineman Ricky Jean Francois (2012), guard Adam Snyder (2011), safety C.J. Spillman (2011) and tight end Delanie Walker (2012).
-- Matt Barrows