For those who have no idea what this means, it started when this shirt appeared in the mail for Garoppolo in January.
Then Kittle wore this shirt during a segment on SportsCenter later that month.
Garoppolo responded by wearing the following as he reported to training camp in July.
And here we are with Kittle pushing the battle forward by wearing a T-shirt featuring his quarterback wearing a shirt featuring the tight end wearing a shirt featuring the quarterback. Wait ... yeah, that's right, I think.