In the NFC Wild Card Round against the New Orleans Saints, Thielen caught seven passes for 129 yards during the 26–20 overtime win. In the Divisional Round against the San Francisco 49ers, he had five receptions for 50 receiving yards in the 27–10 loss. Adam is married to Caitlin Thielen, who has a degree in communication disorders and speech pathology. The couple have two children. Their first son, Asher John Thielen, was born on October 11, 2016. They welcomed their second son, Hudson James Thielen, on January 7, 2019. Thielen is a practicing Christian.