Seven line combinations to watch It might be the first week of preseason, but there is no shortage of intriguing line combinations that have been strung together at training camps. TSN Senior Hockey Reporter Frank Seravalli talks about the production that is being created in Edmonton, Pittsburgh, Montreal and more.

Frank Seravalli TSN Senior Hockey Reporter Follow|Archive

Lines tend to change about as often as coaches change chewing gum. It might be the first week of preseason, but there is no shortage of intriguing line combinations that have been strung together at training camps around the league.

Here are seven lines to keep an eye on:

1. Taylor Hall - Connor McDavid - Teddy Purcell (Edmonton)

The big question is whether or not Purcell, 30, will be able to keep up with McDavid and Hall. That didn't seem to be a problem for Purcell in 2011-12 when he netted 65 points with equally talented teammates in Tampa Bay, like Steven Stamkos and Martin St. Louis. But that was four seasons ago now and Purcell hasn't come close to those numbers since. Purcell left Monday night's win with an injury, pushing Leon Draisaitl to the top unit. Draisaitl has been impressive so far, outplaying Nail Yakupov and Anton Lander on his regular line.

2. Chris Kunitz - Sidney Crosby - Phil Kessel (Pittsburgh)

Kessel seems to have found new life in Pittsburgh, scoring twice in his opening night exhibition. Both goals came on re-directions, with Kessel sneaking a Crosby pass through the legs of Hurricanes goaltender Rasmus Tirronen for his second marker. Kessel, who turns 28 next Friday, reportedly scored just one tip-in goal last season. Kunitz seems to have found an early home in the spot Pascal Dupuis is trying to reclaim in his return from blood clots.

3. Matt Moulson - Jack Eichel - Zemgus Girgensons (Buffalo)

Moulson, a three-time 30-goal scorer, seems poised for a big year lining up with Eichel. He joked after Eichel's two-point debut on Monday that he'll "take 20 of those" feeds from Eichel in the regular season, referring to Eichel's third period setup play. One of Sam Reinhart or Girgensons was going to need to move to the wing before training camp. In his first preseason game, Eichel took 14 of the line's 17 draws - and won 43 per cent of them.

4. Lars Eller - Alex Galchenyuk - Alex Semin (Montreal)

In his first exhibition game in Montreal, Semin will skate with Galchenyuk on Thursday night. It could be a fascinating duo moving forward. The two undoubtedly have the hands and creativity to be productive. Much depends on Semin's motivation level, though that shouldn't be a problem to start the season after his off-season buyout in Carolina. Eller could be a valuable tool, helping dig pucks free and creating space.

5. Milan Lucic - Anze Kopitar - Marian Gaborik (Los Angeles)

They're humongous. They can skate. They're going to score extremely tough to stop as one of the biggest lines in hockey. Gaborik is the smallest player on the line at 6-foot-1 and 205 pounds. Adding Lucic and his 230 pounds only enhances the Kings' big-people-beat-up-little-people model.

6. Jonathan Drouin - Steven Stamkos - Ryan Callahan (Tampa Bay)

The big question heading into Lightning training camp was whether Jon Cooper would keep Steven Stamkos at right wing. We know Stamkos wants to be at centre – and he's back there right now. He and Drouin developed a connection over parts of last season and Drouin, now 20, needs a bounce-back season after appearing in only six of Tampa's 26 playoff games. Callahan has rounded out the trio in almost every practice in training camp, but Alex Killorn filled that spot in the first preseason game.

7. Patrick Marleau - Logan Couture - Brent Burns (San Jose)

This isn't an official line, but it's one that the Sharks used during 3-on-3 overtime this week. With such a versatile player like Burns, who can move up the ice fluidly for such a big man, it's almost like having a third forward on the ice - with all the benefits of a defenceman. Head coach Peter DeBoer has infinite possibilities for putting together overtime personnel groups.