He was introduced on the series as a guest star during All Along the Watchtower, the Season 12 season finale, but came back to replace Mark Sheppard as a series regular for the thirteenth season. He remains part of the main cast from Season 14 and Season 15.
He has appeared in several films and television series, including the Nickelodeon series The Troop, To Be Fat like Me, and The Dead Zone. He was young Justin in Kickin' It Old Skool and he got the lead role in Getting Back Jack. He also starred in The Edge of Seventeen and Scream: The TV Series.
Calvert has also been in a few commercials for Best Buy, Kohl's, Road Runner, General Mills and Mattel.
On July 17, 2015, he was cast in a recurring role as Lonnie Machin for season 4 of The CW's Arrow.
- Season 12
- Season 13
- Season 14
- Season 15
- He made an account for his cat, Lord Tyrion, on Instagram.
- An interview with Bustle reveals that Calvert is a major recipient of Jared Padalecki and Jensen Ackles's pranks. Calvert is proud of this and claims to wear it like a "badge of honor". The crew are said to since Misha Collins used to be pranked the most on set.
- Because Calvert was having so much fun with Jared and Jensen on set, he initially thought he was going to get fired, "It's not supposed to be this fun."