Allen posted a vine video Sunday of himself sipping on an In-n-Out drink while wearing a Raiders hat.
Diehard Chargers fan @LightningReign reached out to the rookie on Twitter questioning his intentions.
“@KAAdeuce1 seriously your wearing a ****ing Raider hat in your vine video??????”
“I know he apologized. Still unexeceptable! Common sense! Burning the hat would be legendary!” @rickywhitlock tweeted.
Allen quickly responded back with an online apology.
“I get it fans!!!! Won’t happen again!” Allen tweeted.