"It was clear that our team needed a change in philosophy and direction," Tallon said. "We have not met the expectations that we set forth at training camp and it is my responsibility to make the necessary changes to ensure that our club performs at its maximum potential."
Tallon said Dineen worked hard, but that the coaching staff's message was not getting through to players and for that, he blamed those in the locker room.
"Our better players have to start playing better or we will get better players," said Tallon, who has been actively trying to reshape Florida's roster through trades in recent weeks, to no avail.
When the Panthers play at Ottawa on Saturday, it will be Peter Horachek the former coach of the team's AHL affiliate in San Antonio behind the bench. Former players Brian Skrudland and John Madden will serve as Horachek's assistant coaches.
"He's a no-nonsense guy," Tallon said of Horachek, who was told of the move Thursday night.
Skrudland and Madden will replace Dineen's assistants, Gord Murphy and Craig Ramsay, who were also fired.
Tallon said he's been considering making a change "for a long time" and that the decision was not easy, emphasizing that the blame hardly falls entirely on Dineen. Florida has only three wins in 16 games this season. Already this year, 11 teams have at least 10 wins.
"It's embarrassing," Panthers forward Shawn Matthias said after the loss in Boston on Thursday night. "I can't remember the last time we won. There are no positives right now."
Florida has lost 10 of its past 11 games and is on its longest skid (0-3-4) since a 10-game slide in April 2011. The Panthers are 3-9-4 this season, and Dineen was told of the firing Friday morning.
"Unacceptable," Panthers defenseman Brian Campbell said Thursday night, describing the way the team is playing.
Dineen was 56-62-28 in parts of three seasons, leading the Panthers to the 2012 Southeast Division title and guiding the team into the playoffs for the first time since 2000. Tallon said Dineen was emotional and upset when told of his dismissal.
"He's been offered an opportunity to stay with our organization," Tallon said.
Dineen comes from a storied hockey family his father Bill Dineen played and coached in the NHL, and his brothers Gord and Peter also were NHL players. Kevin Dineen also played in the NHL, scoring 355 goals in parts of 19 seasons with the Hartford/Carolina franchise, Philadelphia, Ottawa and Columbus. The Florida job was his first as an NHL head coach.
It's already been an eventful year for the Panthers, who made a splashy signing when adding goaltender Tim Thomas, and also have gone through an ownership change with Vincent Viola paying $250 million to buy the franchise in September.
Viola demands excellence, Tallon said, and he's clearly not getting it yet.
"If players don't respond to this, they won't be Panthers for very long," Tallon said.