McKelvin (hip) left Wednesday practice with a groin injury, ESPN.com reports. McKelvin has missed both of the Bills' preseason games thus far, as he gradually returns from offseason hip surgery. The cornerback competed in both 7-on-7 and 11-on-11 drills in practice earlier this week, but apparently needed to exit Wednesday's session early with a groin issue. With McKelvin previously slated to see minimal action in Buffalo's remaining two exhibition contests, news of another ailment could limit him further.