Konecny played two and a half seasons of junior ice hockey for Ottawa before he was traded to the Sarnia Sting at the start of 2016 in exchange for two players and eight OHL draft picks.

Konecny's first two seasons in the NHL were uneven, with both scoring streak and slumps, and coach Dave Hakstol would frequently move his skaters up and down offensive lines.

After Hakstol's firing in December 2018, Konecny found a steady position with Claude Giroux and James van Riemsdyk, and his scoring became consistent.

[2] He grew up in nearby Clachan with his father Rob, a firefighter; mother Terri-Lee, a worker with autistic children; and brother Chase, an engineering student.

[3] Because Clachan was too small to have its own ice rink, Konecny would practice on frozen ponds and would watch hockey games to develop his skills.

[14] While the 67's once again missed the OHL playoffs, Konecny had a dominant rookie season, scoring 26 goals and 44 assists while playing on an offensive line alongside Erik Bradford and Ryan Van Stralen.

[20] The Flyers' other first-round pick, Ivan Provorov of the Brandon Wheat Kings,[20] had played alongside Konecny at the CHL/NHL Top Prospects Game earlier that year.

"[23] After attending the Flyers' training camp, Konecny was sent back to his junior hockey team in time for the start of the 2015–16 OHL season.

[28] On October 10, 2016, Flyers general manager Ron Hextall announced that both Konecny and Provorov had been named to the opening-night roster for the 2016–17 NHL season, and that they were foregoing the usual nine-game tryout period for junior-aged rookies.

[32] By January 2017, Konecny had been flipped from the left wing to the right, and had been moved up to the top line with Claude Giroux and Michael Raffl, although coach Dave Hakstol continued to shift skaters around while attempting to find a rhythm for the team.

[33] After taking a hit against the St. Louis Blues on February 6, Konecny was confined to a walking boot with leg and ankle injuries, and was expected to miss four to six weeks of the season.

[42] Heading into the 2018–19 season, Hakstol wanted to give Konecny a chance not only as the top line right winger, but on the Flyers' penalty kill unit, which had suffered the previous year.

[43] Through the first 10 games of the season, however, a number of skaters saw their positions rotate, with Konecny playing at various points alongside Giroux, Couturier, Nolan Patrick, Oskar Lindblom, and Jordan Weal.

[45][46] Finishing the year on a line with Giroux and James van Riemsdyk, Konecny scored 24 goals and recorded 49 points while playing all 82 regular season games.

[45] He also completed his first career Gordie Howe hat trick that season, with a goal and an assist against Henrik Lundqvist and a brawl with Ryan Strome in a 4–0 shutout win over the Rangers on November 23.

[49] After a strong start to the season in which he led the Flyers with 11 goals and 17 assists, Konecny was removed from a game against the Ottawa Senators on December 7 after taking a hit from Mark Borowiecki, and he was indefinitely placed on concussion protocols.

[52] By the time that the 2019–20 NHL season was indefinitely paused due to the COVID-19 pandemic, Konecny led the team in scoring with 24 goals and a career-high 61 points in 66 games.

[54] Konecny was unable to carry his regular season momentum into the playoffs, with no goals but seven assists in 16 postseason games, as the Flyers fell to the New York Islanders in the second round.

Unlike Gostisbehere, however, Konecny has also shown a physical style of play and is unafraid to hit larger opponents, a technique that has earned comparisons to Tampa Bay Lightning forward Ryan Callahan.

Because Horvat is two years older than Konecny, the pair rarely played with or against each other on childhood teams, but regularly faced each other starting at the junior level.