Danario Alexander

The long history of knee problems experienced by San Diego Chargers wide receiver Danario Alexander has grown even more extensive.

Alexander has required "multiple" surgeries on his right knee because of infection after undergoing a second reconstruction of his anterior cruciate ligament in January, a source told FOX Sports 1.

This setback has cast doubt upon whether Alexander -- a pending unrestricted free agent -- will be able to play in 2014.

At this point, we're not expecting much from Alexander in 2014. Hopefully, he can get the issues with his knee straightened out and eventually return to football.