VANCOUVER, British Columbia -- Both the Vancouver Canucks and Buffalo Sabres are in a defensive state of mind these days -- but for different reasons.The unbeaten Canucks (3-0-0) hope to maintain their strong defense as they host Buffalo (1-1-1) on Thursday night at Rogers Arena. On the other hand, the Sabres (1-1-1) are seeking to improve play in their own end. Vancouver has allowed only five goals against, while Buffalo has surrendered 10.Were not giving up nearly as many shots in the home plate area, which is just in front of the net, said Canucks center Bo Horvat. Were generating a lot more off our turnovers and tracking back and stuff like that. Structurally, were way better this year.The Canucks continue to defy their critics, many of whom picked them to finish last in the 30-team NHL this season. With Tuesdays comeback 2-1 overtime victory over the St. Louis Blues, the Canucks have won three straight games when trailing after two periods. The three comeback wins already match Vancouvers 2015-16 total for wins when trailing after 40 minutes.But Canucks coach Willie Desjardins wants more evidence of defensive dependability.We have worked at it, said Desjardins. That was one of the things going in (this season), that we were going to take away some chances. (But) three games isnt a big enough sample size. Weve got to keep proving it every day.Along with consistent play from defenseman and steady two-way play by forwards, strong goaltending has been a key factor in Vancouvers quick start. But most of the saves have come from supposed backup Jacob Markstrom, who will make his third straight start. Markstrom is pulling No. 1 duty, because Ryan Miller was feeling tight Tuesday morning prior to his cancelled start against St. Louis.As a result, the Canucks had to sign University of British Columbia goaltender Matt Hewitt to a one-day contract as an emergency backup.(The tightness) is something that, over the course of the season, you feel numerous times, Miller said Wednesday after taking part in practice. But once youre able to get that rest, youre fine the next day. It just held on a little bit longer (this time).Miller said he should be available for more exercise Thursday. The Canucks did not announce a call-up from their AHL farm team in Utica, N.Y. He had a slow start to practice, but was able to stay on the ice late.I tried to react to shots rather than take scripted shots, said Miller. Its reacting a lot better than I expected. Its not an injury. Its more a muscle didnt want to settle down after overtime and the shootout (in Saturdays opening win against Calgary.)Although the Canucks are not widely expected to make the playoffs, they have already set an NHL record this season. Vancouver has posted each win despite never having held the lead beforehand.But coach Desjardins was not overly impressed with the record.We cant keep playing that way, he said. We are not going to keep winning if we are behind in the third.Meanwhile, the Sabres aim to stop squandering late leads. Buffalo led twice in the third period Tuesday in Calgary, but still fell 4-3 in overtime.Going forward, theres a lot more we have to improve on, said Sabres center Ryan OReilly, who was beaten on the winning goal and missed a number of scoring chances. We did not have the jump or the compete (level Tuesday). 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DETROIT -- Eric Ebron was on his back, looking as if he feared he was seriously injured.The Detroit Lions tight end pounded the turf with his right fist as the teams medical personnel evaluated his lower right leg.Ebron was later carted off the field, bowing his head and appearing distraught Saturday.He was hurt while blocking on a play on what the team called a mock game, which suddenly became too real for a team already faced with the reality of a passing game without Calvin Johnson for the first time in a decade.After Ebron was injured, the Lions shifted the practice that simulated game situations to the other end of the field.Injuries happen in football, Lions general manager Bob Quinn said.Ebron, drafted by Detroit No. 10 overall in 2014, seemed to be a favorite target of Matthew Stafford earlier in the practice that was open to the public at Ford Field.Stafford acknowledged being concerned about Ebrons injury.I have no idea whats wrong with him, he said.Ebron started 15 games over the first two years of his career, making 72 receptions for 785 yards and six touchdowns.Detroits depth at tight end was thin even before its best player at the position was injured.Brandon Pettigrew has not been cleared to practice while recovering from a torn knee ligament late last year and might not be healthy enough to start the season in five weeks. Tim Wright, another veteran, had a season-ending knee injury earlier this year.The top tight ends left standing might be Cole Wick, an undrafted rookie from the Univversity of the Incarnate Word in Texas, and journeyman Matthew Mulligan, who has 17 career catches since making his NFL debut in 2009.ddddddddddddThe other tight ends on Detroits roster are: Orson Charles, Adam Fuehne and Ben McCord.Mulligan said it was devastating, to see a teammate go down with an injury in practice.All of us are going to have to step up, Mulligan said. Ebron is an incredible player.The Lions may have to use more formations with three or four receivers and one of them will not be Johnson. He left the Lions and the league earlier this year after nine seasons.Detroits top receivers are Golden Tate and a pair of newcomers, Marvin Jones and Anquan Boldin, along with TJ Jones, who was taken out of the mock game after hitting the turf hard on an overthrown pass.I just dove and someone landed on top of me, Jones said. Nothing. Im good. All good to go.Jones refused to say if he went through the concussion protocol.Ill leave that all to the trainers and coach (Jim) Caldwell to talk about the details of everything, but Im feeling great, Jones said.Caldwell spoke to reporters before the mock game, the only time he was scheduled to be available, and declined comment after the pr