Zachary Wilfried Sieler (born September 7, 1995) is an American professional football defensive end for the Miami Dolphins of the National Football League (NFL). He played college football at Ferris State, and was selected by the Baltimore Ravens in the seventh round of the 2018 NFL draft.
On December 5, 2019, Sieler was claimed off waivers by the Miami Dolphins. On April 17, 2020, Sieler was re-signed to a one-year contract by the Dolphins.
On November 16, 2020, the Dolphins signed Sieler to a three-year contract extension through the 2023 season. On August 27, 2023, Sieler signed a three-year, $38.65 million contract extension with the Dolphins.