Garoppolo on Wednesday told the media that Lynch called him and the two had a good talk about the situation.
"John's first-class," Garoppolo said. "Always has been and always will be. I'm sure he didn't do it on purpose, but whatever social media mistake ... stuff happens. I trust John and John's been nothing but good to me since I've been here.
"I don't see him changing anytime soon."
Lynch "liked" a tweet that he was tagged in which read "Leave Jimmy in Nashville" after the 49ers' 20-17 loss to the Tennessee Titans on Thursday. Garoppolo threw two costly interceptions in the loss and missed multiple throws. He also injured his right throwing thumb in the second quarter.
The next day, Lynch explained himself.
On Wednesday, Shanahan revealed Garoppolo has a Grade-3 UCL sprain in his right thumb. He said there's a chance the veteran QB still could play this Sunday against the Houston Texans, and Garoppolo himself is confident he can play through the pain.
If he can't go, rookie QB Trey Lance will make his second career NFL start.
The 49ers can clinch a playoff spot with a win against the Texans and a loss by the New Orleans Saints against the Carolina Panthers.