Michael Frolik, a centre who was Florida's first-round pick in the 2006 NHL entry draft, has been returned to the QMJHL's Rimouski Oceanic.
Frolik scored a goal in his only pre-season appearance.
The Panthers returned three other juniors: defenceman Keaton Ellerby to the WHL's Kamloops Blazers, centre Shawn Matthias to the OHL's Belleville Bulls and right-winger Michal Repik to the WHL's Vancouver Giants.
Ellerby, Florida's first-round pick and 10th overall this year, dressed for one exhibition game and had a plus-1 rating.
Matthias, who Florida acquired from Detroit along with a second-round draft pick for Todd Bertuzzi, appeared in one pre-season game with the Panthers.
Repik, Florida's second-round pick and 40th overall this year, played in two pre-season games and picked up two assists.
Other camp cuts Wednesday:
-Phoenix Coyotes returned defenceman Nick Ross to the WHL's Regina Pats. Ross laced up the skates for an exhibition game Monday. He's in his fourth season with the Pats. He was selected 30th overall in the draft this year.
-Pittsburgh Penguins assigned goaltender John Curry to their Wilkes-Barre/Scranton AHL affiliate. Curry signed as a free agent in July after completing his collegiate career at Boston University. He led all U.S. college netminders with seven shutouts last season.