The Bills are seeking to add depth to the running back position after Karlos Williams reported to minicamp overweight and was later suspended by the NFL for violating the league 's substance abuse policy .
The Bills are just a few days into training camp .
The Bills , who are just a few days into training camp , are seeking to add depth to the running back position after Karlos Williams reported to minicamp overweight and was later suspended by the NFL for violating the league 's substance abuse policy .