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The San Diego Chargers announced Wednesday that they have signed linebacker Jarret Johnson to a four-year contract.

Johnson isn’t a dynamic pass rusher, but he’s long been one of the better edge-setting, run-defending outside linebackers in the game. Johnson can play several linebacker positions.

If the Chargers are seeking a sack specialist, however, they will need to turn to April’s draft. Johnson turns 31 this summer and has never recorded more than six sacks in a season.

He only has four sacks over the past two years, a 32-game stretch.