TORONTO -- A hit by Finlands Leo Komarov on Aaron Ekblad changed Team North Americas course at the World Cup of Hockey.Ekblad has left the team and will not return for the rest of the tournament, so North America goes into its final round-robin game against unbeaten Sweden on Wednesday without its best defenseman.Florida Panthers general manager Tom Rowe told reporters that Ekblad was concussed. North America GM Peter Chiarelli said Ekblad will be evaluated and continue his rehab with Panthers team doctors.Aaron was a very important part of our defense core here and a key leader on this team, Chiarelli said. We wish him all the best in his recovery.North America now must soldier on without the player who had the most ice time in the tournament opener.Hes a great player, goaltender Matt Murray said. He seems like a 10-year veteran and hes only 20 years old. Yeah, well miss him.Without Ekblad, the 2014 No. 1 draft pick whos already an NHL franchise defenseman, North America will need to lean heavier on Morgan Rielly, Colton Parayko and Shayne Gostisbehere in a crucial game.The whole team has to be prepared to play more minutes, and rise to the challenge and take care of each other defensively, Rielly said. You have to learn on the fly a little bit.Coach Todd McLellan praised the play of replacement Jacob Trouba but also lamented Ekblads absence. On a team of 23-and-under Americans and Canadians, youth was a weakness during a rough 10-minute stretch against Russia.When youre a group of young players, youre looking for somebody just to take charge and settle it down, maybe get a shift or two under your belt, and we didnt get that quick enough, McLellan said.North America has no choice but to roll with Rielly, Parayko, Gostisbehere, Trouba, Ryan Murray and Seth Jones.Would we love to have Aaron Ekblad? Absolutely, McLellan said. If we dont, we feel good about the group that we have.Here are some things to watch when North America faces Sweden:WILL MURRAY PLAY: Murray vs. John Gibson is the decision in goal. Murray stopped the first 15 shots he faced against Russia before allowing four goals on consecutive shots and jammed his thumb in the game, but he also won the Stanley Cup and is 8-0 with a 1.60 goals-against average and .935 save percentage after a loss in his NHL career.That does factor into our decision, McLellan said.WILL MURRAY PLAY, PART II: North Americas other Murray, defenseman Ryan Murray, left practice Tuesday. McLellan said it was a maintenance day and expects him to play against Sweden, but if he cant then North America would have to dress 13 forwards and five defensemen.You usually want six, Trouba said.HEN-RIK: Sweden goaltender Henrik Lundqvist returned from a one-game absence because of illness to post a 36-save shutout against Finland on Tuesday. Lundqvist would like to play the second half of the back-to-back, but thats a major question for Sweden.SWEDISH D-LIGHT: The all-world blue line led by Erik Karlsson, Victor Hedman, Anton Stralman and Oliver Ekman-Larsson has been as good as advertised for Sweden, which has allowed one goal in two games. Hedman and Stralman, defense partners on the Tampa Bay Lightning, look in sync as if its midseason.MCDAVID WATCH: North America captain Connor McDavid was superb against Russia, setting up a goal by Auston Matthews. Now that the pressures on, McDavid could be even better and produce more offense.---Follow Stephen Whyno on Twitter at http://www.twitter.com/SWhyno .Ed Ott Jersey . PETERSBURG, Fla. Pirates Jerseys China . 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Nassib has had a recurring elbow injury this season.The Giants signed linebacker Ishaq Williams off their practice squad, as well as running back George Winn.With Nassib sidelined, Josh Johnson becomes Manningss backup.dddddddddddd Johnson has appeared in 29 games with five starts but hasnt played in a regular-season game since Dec. 22, 2013, for Cincinnati against Minnesota. He last threw a regular-season pass on Dec. 11, 2011, for Tampa Bay at Jacksonville. His most recent start was Dec. 4, 2011 against Carolina.---For more NFL coverage: http://www.pro32.ap.org and http://www.twitter.com/AP-NFL ' ' '