Canadian American Association of Professional Baseball
Antonini played with the New Jersey Jackals of the Canadian American Association of Professional Baseball in 2014. He broke the Can-Am League record for most strikeouts in a game with 15 on July 12, 2014, against the Lincoln Saltdogs. For the season, he played in 19 games (all starts) with a 9–3 record and 2.84 ERA.