The Buffalo Bills were healthy for most of the 2019 season with only six players ending up on injured reserve. According to Buffalo News, the Bills finished the year with actually the fewest games lost by starters due to injury.
This is a testament to one of the best medical staffs in the NFL, combined with a little bit of luck. Every NFL team is going to be forced to deal with an injury or two over the course of the year but the good teams are able to minimize the impact on the team’s performance.