2009-10: MacKenzie Weegar played for the Ottawa Senators minor midget AAA team. In 30 games he scored 6 goals with 7 assists and had 24 penalty minutes. Weegar was not selected in the 2010 OHL Priority Draft but was picked by his hometown Nepean Raiders in the third round (29th overall) of the 2010 CCHL Draft.
2010-11: Weegar played five junior A games with Nepean and skated for the Winchester Hawks in the Eastern Ontario Junior Hockey League. He had 2 assists with the Raiders and scored 10 goals with 23 assists and 94 penalty minutes for Winchester. Weegar again passed through the OHL Draft and was selected by Rouyn-Nouranda of the QMJHL in the OHL Waiver Draft.
2011-12: Weegar was the second-leading scorer amongst CCHL defensemen in his first full season with Nepean, trailing only teammate Ryan Johnston. In 53 games he scored 13 goals with 37 assists and had 61 penalty minutes. Nepean finished first in the Yzerman Division and captured the CCHL playoff title. Weegar scored 2 goals with 4 assists and 24 penalty minutes in 18 playoff games. Nepean competed in the Fred Page Cup and in five games Weegar had 1 assist with 4 penalty minutes. Halifax obtained Weegar from Rouyn-Nouranda in a QMJHL trade in February. He was ranked 198th amongst North American skaters in Central Scouting's final rankings but was not selected in the 2012 NHL Draft.
2012-13: Weegar skated in 62 games for the Memorial Cup champion Halifax Mooseheads in his first QMJHL season and was a team-best +55. He scored 8 goals with 36 assists and had 58 penalty minutes on a Halifax team that lost just six games in the regular season. In 17 QMJHL playoff games Weegar had 5 assists and was +13 with 10 penalty minutes. He had 4 assists and was +2 with 4 penalty minutes in four Memorial Cup games. In his second year of draft eligibility, Weegar was ranked 164th amongst North American skaters in Central Scouting's final rankings and was selected by Florida in the seventh round (206th overall) of the 2013 NHL Draft.
Weegar is a small but intelligent defender who makes good choices with and without the puck and who can help his team generate offense. He plays a steady, positional game in his own end, but is quick to join the rush when the opportunity appears. He lacks top-end skills, but is a good skater and an efficient defender.
Weegar will return to Halifax in the fall and will likely take on more responsibilities with the team. Because he entered major junior hockey later than the typical player, he looks like a good candidate for playing an overage season before entering professional hockey.