As an undrafted forward out of the University of Minnesota, Lettieri signed an entry-level contract with the New York Rangers in 2017. After three years in the organization, the Excelsior, Minnesota native played two seasons in the Anaheim Ducks' system (2020-2022).

The Maple Leafs announced today that the hockey club has signed forwards Travis Boyd, Benoit-Olivier Groulx, Michael Pezzetta, and re-signed defenceman Dakota Mermis. Groulx, Pezzetta and Mermis have signed two-year contracts carrying an average annual value of $812,

The Maple Leafs have signed free agent forward Michael Pezzetta to a two-year contract with an AAV of $775,000, league sources told The Athletic’s Chris Johnston. The depth forward was a sixth-round pick of the Montreal Canadiens in 2016 and has spent most of the past four seasons in Montreal.