Both Marshawn Lynch and Doug Martin are over 30 and set to be free agents. The Raiders may need more than one running back and with free agency as the first option, that will literally be the first place they look. There are some great options who could hit the market at the position too.
The Falcons have a few key free agents to worry about. They also have Davonta Freeman under contract until 2022. This could lead to Tevin Coleman slipping through the cracks. Coleman is a talented former third round pick who Mike Mayock had as his 5th best back in the 2015 draft.