ST. LOUIS (AP) — Derek Roy needed less than 2 minutes to redeem himself Thursday night.
After taking what he called a "stupid" penalty, the St. Louis center scored a power-play goal to start a four-goal blitz that led the Blues to a 5-1 win over the struggling New York Islanders.
St. Louis won for the sixth time in eight games. The Islanders have lost eight straight overall (0-6-2) and eight in a row on the road.
David Backes, Jay Bouwmeester, Magnus Paajarvi and Brenden Morrow also scored for the Blues, who improved to 12-1-2 at home and tied Boston (12-3-2) for the most home wins in the NHL. Jaroslav Halak made 22 saves and upped his record to 15-4-2.
Andrew MacDonald scored for the Islanders, who are 2-11-2 in their last 15 games.
Roy took a tripping penalty that led to MacDonald's tying power-play goal at 5:19 of the second period.
"I was pretty mad about the penalty," Roy said. "And they ended up scoring on it. When I got out of the box, I wanted to redeem myself — and luckily I got the chance to."
Roy pounced on the rebound of a shot from Kevin Shattenkirk to give the Blues a 2-1 lead at 7:02.
"I think he felt better about himself," St. Louis coach Ken Hitchcock said of Roy. "His goal seemed to energize us."
Just more than 2 minutes later, Backes scored a power-play goal on a wrist shot from the top of the circle. Paajarvi increased the advantage to 4-1 with his second of the season, capping a three-goal burst in 7:57.
"It was a huge period for us," Paajarvi said. "The whole team really came back to its game."
St. Louis was 3 for 6 on the power play after managing one goal in its previous 10 chances.
"The power-play goals really put us in a hole," New York center John Tavares said. "It's the same thing again. (We're) just not good enough."