NFL News: San Francisco 49ers Lose Another Defensive Player As Justin Smith Retires

After 14 seasons in the National Football League, Justin Smith is retiring from the game, citing injuries to his left shoulder. The five-time NFL Pro Bowler last played for the San Francisco 49ers, where he was key part of the defensive core that helped the team to the NFC championship in 2012. Smith, who plays the defensive end position, joins linebackers Patrick Willis and Chris Borland, both of whom retired from the NFL this offseason.