San Francisco 49ers quarterback Colin Kaepernick got into a Twitter fight with a fan who had mocked him. 

It all began yesterday when Kaepernick tweeted about his intense workout regimen that included "1000 abs, arm workout and 10 minutes straight on the jump rope." 

Niners fan Stephen Batten replied to the quarterback's tweet stating that an "ab workout won't help find open receiver."

That's when Kaepernick fired back with a flurry of tweets, asking Batten, “Are you illiterate or just ignorant?”

Batten has not responded to the quarterback's tweets yet. 

Since he has 725,000 followers, Kaepernick's rant ended up boosting Batten's followers to more than 2,000 and counting.