Cleveland Browns running back Montario Hardesty continues to have problems staying healthy.

Now he'll undergo arthroscopic knee surgery, coach Rob Chudzinski announced today.

Hardesty has missed most of training camp with a hamstring problem.

How long he'll be sidelined is unclear, but this is the latest in a run of injuries for Hardesty.

Hardesty tore a knee ligament three years ago as a rookie.

He rushed for 271 yards last season behind starter Trent Richardson.

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Aaron Wilson covers the Ravens for The Baltimore Sun.