The Toronto Maple Leafs knew theyd be without Calle Jarnkrok for some time with a groin injury.Now we know how much.Hes going to be out at least two weeks and then well go from there, Maple Leafs head coach Sheldon Keefe said following his teams practice on Friday. He wont travel with us. Well see Dwight Howard Jersey where hes at when we return and doctors will get a better sense of where hes at.Jarnkrok appeared to have found his fit in recent days after bouncing around the lineup in various roles. He had spent the previous four games skating on the left wing of the second line alongside John Tavares and Mitch Marner.In his first game with the Tavares-Marner duo, Jarnkrok scored his fifth goal of the season. But with the 31-year-old out of the lineup, it presents an opportunity for Nick Robertson to move back into a top-six role and not nece sarily have to worry about how often hell be slotted in and out of the lineup.I want to get these games, get going and get the production back, Robertson said. Its kind of hard when youre out for a bit and then you come back, hard to get back into it. Now its a challenge with every game I get to do everything I can to stay consistent and stay in the lineup.Robertson started Wednesdays game against Jeff Green Jersey the San Jose Sharks on the fourth line but immediately moved up to the second line when Jarnkrok was injured.Keefe had stre sed in the past that this was the year they expected Robertson to click offensively at the NHL level and an extended opportunity on the second line is his best chance to do that.Robertson had a four-game stretch on the second line earlier this season. In his first game in that role, he scored twice, including the overtime winner. During that stretch, William Nylander had occupied the right wing spot. Now hell get an extended look with Mitch Marner, who is riding an 18-game point streak.Scroll to ContinueIts certainly a confidence boost. And much like Deni Avdija Jersey how defensemen Rasmus Sandin, Timothy Liljegren and Justin Holl have all benefited from a minutes bump due to injuries, Robertson may have the chance to play free on the ice without looking over his shoulder should he make a mistake.It just comes with time, Robertson said. Gary Payton II Jersey More production, more touches, more games, everythings going to come with a flow and be confident in general.Denis Malgin is also someone who stands to benefit with Jarnkrok out of the lineup, However, hell be a scratch for the second consecutive game as the Leafs sprinkle in Wayne Simmonds for the games that need more of a physical edge.The 34-year-old Simmonds will dre s in just his sixth game this season and went on a stretch of 20 days between his fourth and fifth contests this season.It doesnt get any easier, Simmonds said. Its more about making sure you stay ready instead of having to get ready.The veteran forward has come to expect that his role is to be someone who can help the Leafs step up physically against Tampa players like Pat Maroon and Pierre-Edouard Bellemare. Outside of that, its rare for the veteran to get into the lineup for consecutive games, like he did against the Winnipeg Jets and Vegas Moritz Wagner Jersey Golden Knights on Oct. 22 and 24, respectively.With that in mind, this is Robertsons chance to make the most out of every opportunity to skate with the likes of Tavares and Marner and show he belongs in the top-six.It starts against the Tampa Bay Lightning on Saturday.Defensively, I think theyre just an offensively-gifted team, Robertson said. I think we just have to match that.