Receiver Percy Harvin was happily retired and investigating potential business deals when the Bills called to inquire if he was interested in rejoining the team, according to league sources. The approach caught him totally by surprise; he had not been trying to maintain football shape or plotting any sort of return, but after mulling their offer for about 24 hours, opted to pursue it.

Bills senior vice president of football administration Bill Overdorf first broached the topic of Harvin's availability internally several weeks ago, sources said, with running back LeSean McCoy hobbled and receiver Sammy Watkins out indefinitely. Initially it received a tepid response from other team officials, but after a second straight loss he received the go-ahead to explore it.

Overdorf reached out to Harvin's representatives, who were unsure if he would heavily consider it, but the former first-round pick decided to fly in for a physical after deliberating for a day and was promptly signed.

The Bills plan for Harvin to see at least limited action Monday night in Seattle, sources said -- he also formerly played for the Seahawks -- and, if not, he should be ready for a bigger role by the time Buffalo returns from its Week 10 bye. McCoy, still battling a hamstring issue, is expected to give it a go Monday, though that is an injury that he has easily aggravated in the past.