Jonas Jennings on injured reserve

The San Francisco 49ers put left tackle Jonas Jennings on injured reserve Monday, ending another disappointing season for the oft-injured lineman.

Jennings has an ankle injury that requires surgery, coach Mike Nolan said.

He missed the 49ers' last two games after spraining his ankle in a loss to the New York Giants. Nolan said team doctors recommended shutting down Jennings, who has struggled with injuries almost every week since Nolan gave him a seven-year, $36 million contract as a free agent from Buffalo in 2005.

Jennings missed 13 games with a shoulder injury that season, then sat out three games with injuries last season. The seventh-year pro also was given a one-week leave of absence last month to tend to what Nolan called “a personal matter,” though the Atlanta native stayed in the Bay Area and wouldn't give details of the issue.

Adam Snyder has replaced Jennings again at left tackle. The third-year pro started 10 games in Jennings' place over the previous two seasons, then stepped in again last month.

“It's unfortunate to lose any player on our team, but at the same time, I have confidence in Adam,” Nolan said.

Snyder gave up a sack and struggled to block Falcons defensive end John Abraham in San Francisco's 20-16 loss to Atlanta on Sunday.

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