Ryan Johansen undergoing tests for late-game fatigue

COLUMBUS, OH - OCTOBER 16: Ryan Johansen #19 of the Columbus Blue Jackets and Nick Foligno #71 of the Columbus Blue Jackets skate against the Toronto Maple Leafs on October 16, 2015 at Nationwide Arena in Columbus, Ohio. (Photo by Jamie Sabau/NHLI via Getty Images)

Columbus Blue Jackets forward Ryan Johansen is undergoing tests to determine why he’s losing energy late in games according to a report from the Columbus Dispatch.

Johansen left the team’s last roadtrip and flew back to Columbus from Denver with what the Blue Jackets initially called an “illness.” The Dispatch then reported the former All-Star had to be hospitalized at least once during the offseason with an accelerated heart-rate.

Per the Dispatch.

"It’s nothing with his heart," Johansen's agent, Kurt Overhardt, told The Dispatch on Monday. "He’s just not feeling well, and we’re trying to figure out why. His energy level has been down. There’s no alarm here. We want to do the right thing and make sure he’s 100 percent when he’s on the ice.”

Citing a source, the Dispatch said Johansen started feeling “run down” on Oct. 17, after a loss at the Chicago Blackhawks.

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Johansen didn’t play the final 6:10 of Columbus’ Thursday loss at the Minnesota Wild. This prompted speculation that new coach John Tortorella had benched Johansen. The New York Post then reported Tortorella did indeed sit Johansen because the forward was out of shape – a report Tortorella denied.

"Joey is ... he doesn't feel well; he lacks energy, so we'll list him as day-to-day," Blue Jackets coach John Tortorella said. "He’s just getting some medical tests done. We’re going to leave him alone and see if he can get that straightened out.

One of the top young centers in the NHL, the 23-year-old Johansen has one goal in eight games played this season. He’s coming off a season where he notched a career-high 71 points. Johansen has played all 82 games each of his last two seasons.

The Blue Jackets are 1-8-0 and had the NHL's longest losing streak (eight games) to start a season since the 1943-44 New York Rangers.

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Josh Cooper is an editor for Puck Daddy on Yahoo Sports. Have a tip? Email him at puckdaddyblog@yahoo.com or follow him on Twitter!