Jamaal Charles rushed for 7,260 yards during his nine seasons with the Chiefs while averaging 5.5 yards per carry, an NFL record.

So when Charles signed a one-year contract with the Broncos, a bitter rival, fans in Kansas City reacted as one might expect. One Chiefs fan on reddit said he was “crushed.” Another fan compared it to when defensive lineman Neil Smith switched from Kansas City to Denver in 1997.

Jamaal Charles signs with Denver. Let's check in on Chiefs fans: pic.twitter.com/CkwYfEkSHn — Jon Heath (@JonHeathNFL) May 3, 2017

Smith, by the way, went on to win back-to-back Super Bowls with the Broncos. He finished his career with 104.5 sacks, 19 of them coming during his three seasons in Denver.

Charles winning a Super Bowl of his own with the Broncos would be a nightmare for Chiefs fans. Here’s a sample of how fans reacted when the veteran running back tweeted a picture of himself signing with the Broncos:

@jcharles25 @Broncos Say it ain't so. Sad I have to unfollow my favorite chief of all time. Can't look at this nonsense. #DonkeysSuck — Mike Thomas (@SigEpMagicMike) May 3, 2017

Not all fans in KC were angry — many of them wished the RB well.

@jcharles25 @Broncos We in KC will miss you @jcharles25 thanks for all of the memories 25!!! Get healthy and play good against every team except KC!! 😂🙏 — Alex Burkart (@Burk20) May 2, 2017

@jcharles25 @Broncos Always a Chief! This is just a brief stop over. Congratulations and all the best 14 out of 16 weeks this fall. — Bob (@bstill22) May 2, 2017

Charles will face his former team on Oct. 30 and Dec. 31 this season.