On Friday, head coach Doug Marrone said discussions are ongoing about how to fill the open roster spot.
The Bills don’t play again until they host the New York Jets on Nov. 23.
McKelvin is in his seventh season with Buffalo and has a career-high four interceptions this season. In 10 games, McKelvin had 48 tackles, eight passes defended and a forced fumble.
He is also the primary punt returner for the Bulls, with an 8.7 yard per return average on 21 attempts. McKelvin had his second career two-interception game on Oct. 19 in a victory over the Minnesota Vikings.
The 11th overall pick by Buffalo out of Troy in the 2008 NFL Draft, McKelvin hasn’t played a full 16-game season since 2011. In 89 career games, he has 11 interceptions and led the NFL in punt return average in 2012 with an 18.7 yard per average mark.
The team did not specify a timetable for his return.
- Phil Watson