The Sabres aren't retaining any of Montour's $3.85 million salary, reports TSN's Darren Dreger.
Montour, a pending unrestricted free agent, joined the Sabres from the Anaheim Ducks during the 2018-19 campaign. He has 14 points in 38 games this season while averaging over 20 minutes of ice time per contest.
The 26-year-old's advanced stats took a major hit after joining Buffalo:
The Panthers are in the thick of the race for top spot in the Central Division and entered Saturday one point back of the first-place Carolina Hurricanes. Florida was widely expected to be in the market for a defenseman after top-pairing stalwart Aaron Ekblad recently suffered a season-ending injury.