As a pitcher, he was named the #79 prospect in baseball by Baseball America prior to the 2011 season.[3] However, in 2011, with the Low–A State College Spikes, he walked 29 batters in 26 innings, and in 2012, with the West Virginia Power, he walked 8 batters in 2/3 of an inning. Allie's severe control problems caused the Pirates to convert Allie into an infielder in June 2012.[4]
In 2016, Allie again returned to Altoona, playing in 111 games and hitting .247/.324/.444 with 16 home runs and 63 RBI. He elected free agency following the season on November 7, 2016.[7]
Los Angeles Dodgers
On November 14, 2016, Allie signed a minor league contract with the Los Angeles Dodgers, who assigned him to the Double–A Tulsa Drillers of the Texas League to start the 2017 season.[8] In 32 games for the Drillers, he hit only .216.[9] The decision was then made to convert him back to pitching.[10] He pitched in 11 games in the Dodgers system after that (eight for the rookie level Arizona League Dodgers, two for the Rancho Cucamonga Quakes and one for the Oklahoma City Dodgers) and did not allow an earned run in 11 innings over that period.[9]
In 2018, Allie pitched in 22 games for the Quakes, 11 for the Drillers and 13 for the Oklahoma City Dodgers, with a 7–1 record and 5.57 ERA.[9] He split the 2019 campaign between Tulsa and Oklahoma City, accumulating an 8.54 ERA with 50 strikeouts and 2 saves across 41 total appearances. Allie elected free agency following the season on November 4, 2019.[11]
Boston Red Sox
On February 13, 2020, Allie signed a minor league contract with the Boston Red Sox.[12] Allie did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic.[13] He became a minor league free agent on November 2.[14]