There's no question Lightning center Tyler Johnson can be a dynamic player. He's a former All-Star and a clutch playoff performer, reasons why Tampa Bay signed him to a seven-year, $35 million extension in July. "He's in the prime of his career," GM Steve Yzerman said. The only question is whether Johnson can stay healthy. He's missed 29 games over the past two years. That doesn't include the injuries Johnson has tried to play through, no doubt limiting his effectiveness: *A broken wrist, suffered in 2014-15 Stanley Cup Final, which Johnson said hampered him for a good part of the following season. *An upper body injury in Nov. 2015, and undisclosed injury Dec. 2015 which sidelined him for most of the month. *A lower-body injury in February of last season, and another one in early March. Johnson tried to come back for a couple games in early April as the Lightning battled for a playoff spot, but was then shut down. However, after revamping his workouts and diet over the summer, Johnson, 27, hopes he's found the right solution. Johnson feels a big difference over this time last last year, when he believed he was stronger and faster than ever.