Biagini was returned to Triple-A Iowa on Monday, Jordan Bastian of MLB.com reports.
Biagini spent most of the 2021 campaign in the minors, but his contract was selected during the final weekend of the season. He made a relief appearance against the Cardinals during the season finale and allowed two hits and a walk while striking out two in three scoreless innings, but he'll be removed from the 40-man roster heading into the offseason.