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Associated Press

The NFL burned white-hot last week, free agency providing the spark and truckloads of cash providing the tinder.

Let's look back at the action from the first week of free agency—trades and all—and how each team fared. Some teams stayed quiet, garnering poor grades for sitting on their hands. Others scored poorly because they suffered heavy losses or simply signed bad players.

On the flip side, some franchises made big splashes to improve their rosters and got nice grades for it.

These grades are based on the first week of free agency, so guys who were cut a month ago or slapped with the franchise tag don't factor into the process. Also, players who haven't signed a contract anywhere yet, save for the ones who were cut within the past week, do not factor in.