Howell is set to be the backup quarterback to Dak Prescott for the Cowboys' Week 1 game against the Giants.
The Cowboys waived Joe Milton on Tuesday, leaving Howell as the sole reserve quarterback on the 53-man roster. The 25-year-old signed with the team in March after failing to have his contract extended by the Eagles during the 2025 season. The 2022 fifth-round pick by the Commanders will now start his second NFL contract with a division rival.