THE Los Angeles Chargers have discovered how long Khalil Mack will be sidelined.

Mack, 34, dislocated his elbow during the Chargers' 20-9 victory over the Las Vegas Raiders on Monday.

However, Mack was forced to leave the game early following a nasty collision when he collided with team-mate Troy Dye when attempting to make a tackle on Tre Tucker.

The linebacker saw his arm get sandwiched between them, which inverted his elbow.

There were fears Mack's injury could be season ending.

But the Chargers have been dealt some good news after his injury timeline was revealed.

Mack is expected to return in a few weeks, as reported by NFL Network's Ian Rapoport , and will miss at least the next four games.

On Wednesday head coach Jim Harbaugh announced Mack would be placed on injured

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