“I think the one thing that was impressive was we’re down two and got five unanswered (goals),” Lightning coach Jon Cooper said. “I’m really proud of the way we battled back.”

“He’ll be fine,” St. Louis coach Ken Hitchcock said of Allen, who appeared to have a lower-body injury.

Tampa Bay also got goals from Brian Boyle and Michael Bournival. Andrei Vasilevskiy made 21 saves and Victor Hedman had three assists.

The Lightning are without oft-injured goalie Ben Bishop, who could miss a month with an undisclosed lower-body injury. Bishop, a potential free agent after the season, was hurt in the first period of Tuesday’s 4-1 win over Detroit.

David Perron and Wade Megan scored 32 seconds apart in the first period, and Allen stopped 27 shots for the Blues. St. Louis saw a six-game winning streak against Tampa Bay end.

The Blues are 5-10-1 on the road, compared to a home record of 13-2-4.

“We had a great first period,” Hitchcock said. “When they scored their second goal they took the game over. They won the board battles, we weren’t able to create anything. You’ve to play 60 minutes and we didn’t.”

After Boyle redirected Hedman’s shot during a power play midway through the second, Bournival, recalled from Syracuse of the AHL before the game, tied it at 2 with 2:33 left in the period. Boyle has four goals in the last five games, while Hedman has nine assists over the same stretch.

“The way we battled through adversity again, being down two goals is never easy in this league,” Hedman said.

Perron stole Brayden Point’s pass through the slot and put a back-hander past Vasilevskiy for his 150th career goal at 14:11 of the first. Megan, making his NHL debut, got his first goal at 14:43.

“Obviously it would have felt better if it came in a win,” Megan said. “But certainly it did feel good.”