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.
More San Francisco 49ers News
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49ers TE George Kittle reaches milestone against Lions
San Francisco 49ers tight end George Kittle needed just 33 yards on Monday night to secure his fourth career season with at least 1,000 receiving yards. Kittle reached the milestone in the first quarter against the Detroit Lions, accomplishing it on the play shown... -
George Kittle, Ricky Pearsall have big games; Key stats from 49ers-Lions
The San Francisco 49ers dropped to 6-10 on the season after a 40-34 Week 17 loss to the Detroit Lions at Levi's Stadium in Santa Clara, California. Below are several statistics and notes from Monday's game, which were provided by the 49ers Communications staff. 49ers... -
How PFF graded George Kittle, Brock Purdy, other 49ers players vs. Lions, plus snap counts
The San Francisco 49ers dropped their record to 6-10 after a 40-34 loss against the Detroit Lions in Week 17. Today, Pro Football Focus released its grades and snap counts from the game. Which Niners stood out, and who has more to prove in the season finale against the Arizona... -
49ers' Brock Purdy, George Kittle look to play spoiler to Lions on Monday night
This week, Detroit Lions head coach Dan Campbell made his intentions clear when asked about Monday night's primetime NFC Championship Game rematch against the San Francisco 49ers—the team that ended Detroit's Super Bowl hopes last season. "I'll make this easy for...