The Chargers have begun training camp. Here are players and key position battles to watch -- and a 53-man roster projection.

The Los Angeles Chargers are already seeing a rookie running back attempt to take the top spot in the backfield during training camp.

The Chargers continued training camp on Monday at The Bolt in El Segundo, CA, marking the fourth day. Training camp can be attended for free (with a ticket), but if you cannot be there, you will still be informed of the action throughout it all.