By STEPHEN WHYNO
AP Hockey Writer
The Florida Panthers are on the brink of getting swept out of the second round of the playoffs by the back-to-back defending champion Tampa Bay Lightning. And the Presidents’ Trophy winners don’t have any time to regroup with Game 4 set for Monday night. An arena conflict in Tampa caused by a concert forced a rare postseason back to back. The Panthers are trying to frame it as a benefit of not dwelling on their predicament. But coming back from down 3-0 in a best-of-seven series has only happened four times in NHL history. Out West, the Colorado Avalanche lead the St. Louis Blues 2-1 going into Game 4.