Here’s an interesting, yet unsurprising stat about NFL injuries.

Over the past four seasons, there have been 202 ACL tears in the NFL, according to the ACL Recovery Club. That’s about 50 per season.

There've been 202 torn ACL's in the NFL that required reconstructive surgery in the last 4 seasons:

2016 – 46

2015 – 48

2014 – 45

2013 – 63 pic.twitter.com/EeJdW2u4Ka — ACL Recovery Club (@ACLrecoveryCLUB) February 6, 2017

The Kansas City Chiefs account for nine of those torn ACLs, with at least two per season over the last four years. Here are Chiefs players with torn ACLs since 2013:

2016: OLB Justin Houston, FB Trey Millard, OG Parker Ehinger

2015: CB Phillip Gaines, RB Jamaal Charles

2014: RB Cyrus Gray, QB Tyler Bray

2013: OL Colin Kelly, WR Kyle Williams

Torn ACLs have plagued the Chiefs (and plenty of other NFL teams) over the years. KC fans will never forget the dreaded 2011 season when Charles, safety Eric Berry and tight end Tony Moeaki all went down with ACL tears to kick off the season.

It has gotten to the point where football fans are conditioned to think “ACL tear” whenever a player goes down on the field holding his leg. Luckily, technology and medicine has become so advanced that players are normally able to return from these injuries after a year or so of surgery and recovery.