Cooper Kupp's time with the Rams ended with his release on Wednesday ... but before he finds a new squad, the receiver took time to thank L.A. for the past eight years.
Kupp posted the heartfelt letter to his social media not long after the news was made official ... saying his time with the organization was filled with "incredible memories -- despite the struggle of getting fans to buy in early on."
"But we knew at the end of the day, it’s about providing moments," Kupp wrote.