ESPN's Adam Schefter reported it early Tuesday morning, and now the Buffalo Bills have confirmed that running back Marshawn Lynch is on the practice field at Bills OTAs.

Lynch was at the team facility in Orchard Park in recent weeks, but elected not to take the practice field at that time. His arrival comes more than a full week before mandatory mini-camp sessions begin next Wednesday.

The fourth-year running back has been the subject of trade rumors all off-season, which includes a Monday report from NFL.com's Jason La Canfora that the Seattle Seahawks remain interested in acquiring the former Cal star. To this point, the Bills have flatly refused to deal Lynch, who was rumored to be sitting out to voice frustration over his position with the team.

In all, Lynch missed four weeks' worth of voluntary practices (three weeks' sessions of OTAs, plus a voluntary mini-camp squeezed into a weekend between OTA sessions). He's expected to be the Bills' third running back entering the 2010 regular season, behind veteran starter Fred Jackson and rookie C.J. Spiller.