Education
He attended Dwyer High School in Palm Beach Gardens, Florida, where he played football, basketball, lacrosse and ran track.
He attended Dwyer High School in Palm Beach Gardens, Florida, where he played football, basketball, lacrosse and ran track.
He was drafted by the Bills in the sixth round of the 2015 NFL Draft and was released from the active roster prior to the opening week of the 2015-2016 NFL regular season, before signing with the practice squad. He played college football at Florida State. O'Leary is one of five children of Bill and Nan (Nicklaus) O'Leary.
As a senior, he had 51 receptions for 875 yards and 12 touchdowns. Considered a four-star recruit by Rivals.com, he was ranked as the No. 1 tight end recruit in his class.
As a true freshman in 2011, O'Leary played in all 13 games with two starts. He finished the season with 12 receptions for 164 yards and one touchdown. As a sophomore in 2012, he started 11 of 13 games, recording 21 receptions for 252 yards and three touchdowns.
After considering entering the 2014 NFL Draft, O'Leary returned to Florida State for his senior season. During his senior season he set Florida State's record for career receptions for a tight end. He again was a finalist for the John Mackey Award, this time winning it.
He was also named a consensus All-American. O'Leary finished the season with 48 receptions for 618 yards and six touchdowns. For his career he had 114 receptions for 1,591 yards and 17 touchdowns.
Buffalo Bills
O'Leary was drafted by the Buffalo Bills in the sixth round (194th overall) of the 2015 NFL Draft. On September 8, 2015, the Bills cut O'Leary after re-signing Matt Cassel. Two days later, he was added to the Bills practice squad.
On December 8, 2015, O'Leary was promoted to the 53-man roster after Matthew Mulligan was cut.