Hailing from Pittsburgh, Pa, Cory Deighan was a two-year letter winner at Seton-LaSalle Catholic High School and was part of the team ranked first in the WPIAL and fifth in the state in 2009. During that two year span, Deighan led the Rebels in wins (10) and home runs (7).
Deighan spent two seasons playing junior college baseball at CCAC-South from 2011-2013 where he racked up 101 strikeouts and holds numerous pitching records. He finished 17th in the nation in 2013 with an ERA of 2.31, while going 5-2 on the hill and cracking the top 50 in strikeouts per 9 innings (9.34).
Deighan was a student-athlete at Pitt-Greensburg from 2014-2015 where he helped the team finish back to back seasons with the most wins in their program history. In a start in 2014, he set the single-game strikeout record (11) in a complete game victory against Curry College.
In 2015, Deighan tied for the conference lead in games and started (9) during the regular season, and finished 3rd overall in games started (10) by seasons end. He finished the season accumulating a team high of 60 innings on the mound, ranking him third in the conference, and His 10 starts that season are the 2nd most in a single season in the history of the Pitt-Greensburg program.
Deighan finished his two-year UPG career 7th of all time in strikeouts (86), while holding a place in the top 10 in the seven other categories of the UPG record books. He was awarded the Dave Coradi Leadership Award in 2015 for outstanding leadership both on and off the field, and was honored by the program with the naming of the Cory Deighan Pitching Excellence Award which recognized the most outstanding pitcher during the fall season.
Certified through ISSA as a personal trainer in 2012, Deighan was heavily involved in the Bobcat's strength and conditioning programs and also serves as a pitching consultant with the Triple Crown Baseball Program in Puerto Rico.
Deighan graduated with a Bachelor’s degree in Psychology from Pitt-Greensburg in 2015, and works as an addictions counselor at MedMark Treatment Center.