McDonagh was traded to the Lightning from the Predators along with a 2024 fourth-round pick in exchange for a 2025 second-round selection and 2024 seventh-round pick Tuesday.
McDonagh spent five seasons with the Lightning during his previous stint, logging 267 regular-season games for the club while lifting Lord Stanley's Cup twice during his stay. McDonagh figures to slot into a third pairing for the Lightning. With the acquisition of McDonagh, Tampa Bay is unlikely to re-sign Matt Dumba or Calvin de Haan.