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Alex Kovalev is in his second stint with the Penguins, but is struggling to find his offensive game. ((Justin K. Aller/Getty Images))

Ottawa was active at the trade deadline peddling veterans for draft picks, and Tuesday one of its top scorers returns to Scotiabank Place.

Alex Kovalev, who had 32 goals and 44 assists in a season-and-a-half with the Senators, was traded to Pittsburgh on Feb. 24 for a conditional seventh-round pick.

Burning an old team would be timely for Kovalev. He has only one point in eight games in his second stint with the Penguins.

"I think he's going to want to prove something, that's for sure," coach Dan Bylsma said.

After three consecutive 2-1 victories, Ottawa fell 6-4 to Buffalo on Sunday evening.

Jason Spezza starred on offence for the Senators with two goals and two assists, with Colin Greening and Erik Karlsson the other goal scorers.

Craig Anderson, a godsend in net since coming over in mid-February from Colorado, had his first legitimately bad outing for the Senators. He was replaced by Curtis McElhinney after allowing four goals on 17 shots.

The big happening surrounding the Penguins on Monday was the sighting of Sidney Crosby on the ice.

Crosby participated in a light workout for about 15 minutes in full gear, the first time he's been spotted on skates in public since last playing Jan. 5 against Tampa Bay.

Pittsburgh is 14-10-5 without him, with most of those games also coming without star Evgeni Malkin, out for the season with a knee injury.

'A long season'

After a lifeless 3-0 loss to Montreal on Saturday, Pittsburgh bounced back with a 5-1 victory over Edmonton on Sunday.

"I've learned it's a long season, and there's just going to be some tough ones and bad nights," said Marc-Andre Fleury, who allowed three goals on 12 shots before being pulled Saturday, but made 28 saves Sunday. "You have to be able to put them behind you as fast as possible, forget about it and just move onto the next game."

Chris Kunitz scored two goals, his first since returning from a monthlong injury absence, while Tyler Kennedy continued to flourish in a more offensive role due to the injuries Pittsburgh is facing.

Kennedy has 15 goals and 21 assists this season, which already match career highs.

Pittsburgh took both home meetings earlier this season, while the Senators won 3-1 in Ottawa on Dec. 26 behind two goals and an assist from defenceman Erik Karlsson.

The Senators continue their three-game homestand Thursday against New Jersey. Ottawa has been one of the few teams to beat the Devils during that team's hot span over the past two months.

With files from CBCSports.ca