Head coach Jay Gruden said Friday that Kelley will have a big opportunity in Sunday's game against the Bengals, CSN Mid-Atlantic reports.

Matt Jones (knee) was officially ruled out for Sunday's game in London, leaving Kelley, Chris Thompson and Mack Brown as the team's healthy running backs. According to ESPN's John Keim, head coach Jay Gruden said Thursday that Kelley would likely take on the lead role in the event of a Jones absence, with Thompson mostly sticking in the passing-down role he's thrived in. Kelley, an undrafted rookie, thus figures to get the first crack at early-down carries, which could also make him Sunday's starter. However, it's still possible Thompson will take on a larger role than usual -- particularly on the heels of last week's strong showing in Detroit. There's also some chance Brown could eat into Kelley's carries, though Thompson seems like the bigger threat.