Buffalo Bills rookie running back Devin Singletary missed practice today. Singletary is nursing a hamstring injury which forced him to leave last Sunday’s win over the Giants. Bills Coach Sean McDermott says Singletary is day-to-day. Bills tight end Tyler Kroft is close to playing. Kroft was a full participant in practice today for the first time since breaking his ankle on the first day of OTAs. Kroft could make his Bills debut against his old team Sunday when the Bills host the Cincinnati Bengals at New Era Field. Cornerback Taron Johnson is still not practicing while he nurses a hamstring injury.