2008-09: Mark Scheifele was chosen in the seventh round, 134th overall, of the 2009 OHL Priority Selection by the Saginaw Spirit.
2009-10: Scheifele played for the Kitchener Dutchmen Junior "B" team. In 51 games, he scored 18 goals and added 37 assists for 55 points. Scheifele's rights were traded to the Barrie Colts by the Saginaw Spirit prior to the 2010-11 season.
2010-11: Scheifele opted to forgo his commitment to Cornell University and instead decided to play for the Barrie Colts of the OHL. Scheifele spent the season with the OHL's Barrie Colts. In 66 games for that team, he scored 22 goals and added 53 assists for 75 points. His point total placed him second among OHL rookies, while his assist total topped that category for rookies. Scheifele played for Team Cherry at the 2011 CHL Home Hardware Top Prospects Game. He also played for Canada at the 2011 U-18 World Junior Championship, scoring 6 goals and adding 2 assists for 8 points in 7 games.
2011-12: Scheifele made his NHL debut with the Jets as an 18-year-old, skating in seven games at the beginning of the season before returning to Barrie for his second OHL season. He also played for Canada in the 2012 U20 World Junior Championship. Scheifele scored his first career goal (and only NHL point) in an October 19th game at Toronto and was an even plus/minus; averaging just under 11 minutes of ice time. Sheifele joined Jets' affiliate St. John's in the AHL playoffs and had 1 assist in 10 games. He had 63 points in 47 games for Barrie, scoring 23 goals with 40 assists, and was plus-21 with 36 penalty minutes. The Colts finished second in the Central Division and reached the playoffs' second round. Scheifele was the second-leading scorer in the playoffs for the Colts behind fellow Jets' prospect Ivan Telegin; finishing with 5 goals and 7 assists in 13 games. He scored 3 goals with 3 assists and was plus-two in six games at the WJC as Canada won a bronze medal.
2012-13: Scheifele joined the Jets following the World Junior Championship and NHL lockout and played in four games for Winnipeg before being sent back to Barrie to finish the OHL season. He had no points nor penalty minutes, averaging 11:31 minutes of ice time, during his brief time with Winnipeg. Scheifele led fourth-place Canada with 5 goals and was +1 with 3 assists and 2 penalty minutes in six games at the WJC. He was the second-leading scorer for Barrie despite playing just 45 games with the Colts. Schiefele had a team-high 39 goals with 40 assists and was +27 with 30 penalty minutes. Barrie finished first in the Central Division and reached the OHL finals against London; taking a 3 games to 1 lead before the Knights came back to win three straight. Scheifele scored 15 goals with 26 assists in 21 playoff games and was +18 with 14 penalty minutes.
The 6'3 Scheifele brings size and skill to the center position for the Jets, something they sorely lack in the prospect pool. He is also a five tool prospect, blessed with size, speed, smarts, skill, and vision. Playing against the best centers in the OHL every game, Scheifele stood out thanks to his work rate and ability to make the best of a poor situation, playing on the worst team in the league.