Freshman season Warney made his collegiate debut in Stony Brook's season opener on November 9, 2012, against
Marist, recording eight points and five rebounds. In his second game against
Mount Ida, Warney scored 16 points on a perfect 8-for-8 from the floor, becoming the first Stony Brook player in program history to attempt at least eight shots and make them all. He earned America East Rookie of the Week honors for these performances, the first Stony Brook player to be named since 2009. Playing against
UConn, Warney grabbed a then-best 11 rebounds. After the game, Huskies head coach
Jim Calhoun visited the Stony Brook locker room to personally praise the 18-year old Warney. Warney led Stony Brook with 17 points in a 76–69 loss to
Maryland. He won eight America East Rookie of the Week awards en route to being named America East Rookie of the Year, second-team All-America East, America East All-Defensive Team and America East All-Rookie Team. He was the first Stony Brook player to win Rookie of the Year and the first Stony Brook freshman to be named to an All-America East team and the All-Defensive Team. Stony Brook was eliminated in the semifinals of the
America East tournament to
Albany, losing 61–59 on a last-second layup. In the opening round of the
NIT, Warney had 16 as Stony Brook beat
UMass 71–58 for the program's first-ever NIT win. Against
Iowa in the second round, Warney led Stony Brook with 17 points and seven rebounds, but the Seawolves lost 75–63 and ended the season with a 25–8 record. Warney ended his freshman season averaging 12.4 points, 7.2 rebounds and 1.5 blocks per game. His .618 shooting percentage was the best in the America East, while he was the sixth-best in rebounds and second-best in blocks. He shot .650 in conference play.
Sophomore season Warney won his first America East Player of the Year award during the
2013–14 season, averaging 14.5 points, 8.0 rebounds and 1.2 blocks per game while shooting .616. He was also named first-team All-America East. He was also named an
AP honorable mention All-American, a
Lou Henson Mid-Major All-American and first-team All-Met. Warney became the first Stony Brook player to record three straight double-doubles. He scored 12 points in the
2014 America East championship game as Stony Brook lost 69–60. In the
CBI opening round against
Siena, Warney had 15 points and 10 rebounds, his tenth double-double of the season, and a new career-high five blocks.
Junior season Warney repeated as America East Player of the Year for the
2014–15 season, averaging 16.7 points, 11.7 rebounds and 2.5 blocks per game, leading the conference in all of those statistics. He also won his first America East Defensive Player of the Year award and earned another first-team All-America East and All-Defensive Team selection. He led all of Division I with 24 double-doubles and 409 rebounds, and was one of 17 players to average a double-double on the season. He tied former
Drexel star
Malik Rose's America East record for most rebounds in a season. He had the most total rebounds in Division I and finished third in rebounds per game. Warney scored his 1,000th career point against
LIU Brooklyn at
Madison Square Garden in the NIT Tip-Off. He had an 18-point, 11-rebound, 8-block performance versus
Loyola Maryland. In Stony Brook's first program win against a ranked opponent, No. 13
Washington, Warney scored the go-ahead bucket. He set a conference record by winning eight straight America East Player of the Week awards. He was named as a finalist for the Lou Henson Award, an
AP honorable mention All-American, a NABC All-District Team selection and first-team All-Met. Warney's 11.7 rebounds per game and 409 rebounds remain the single-season Stony Brook program record. His 575 points are the most by a Seawolves player in his junior season and were the most in a single season before he broke his own record the following year. He shot .630 and averaged 19.8 points, 10.8 rebounds, 1.6 assists and 3.0 blocks in 33 games, leading the America East in shooting percentage, points, rebounds and blocks. He recorded 21 double-doubles in 33 games. His 94 blocks were the fourth-most in Division I. He led Stony Brook with 22 points and 11 rebounds against No. 17
Vanderbilt in a 79–72 OT loss. Facing
Notre Dame, Warney recorded both his 1,000th career rebound and 200th career block. With 29 points against
Northeastern, Warney overtook Bryan Dougher (1,609) to become the top scorer in Stony Brook's Division I history. He set a new Stony Brook program record with nine blocks against
Princeton, adding 26 points, 15 rebounds and five assists as well. On January 25, 2016, Warney passed
Tommy Brenton (1,115) for the most career rebounds in Stony Brook history. On February 8 versus
Hartford, Warney set a new career high with 36 points on 16-for-18 shooting, tying the Stony Brook single-game point record. He won his 16th America East Player of the Week award, a new conference career record, on February 15. Warney led Stony Brook to a nation-leading 18-game win streak and a 22–4 record. He was named to the 35-man midseason watch list for the
Naismith Trophy and one of the final five finalists for the
Karl Malone Award, given to the best power forward in the NCAA. He broke 2,000 career points on February 21 against
Maine, becoming the 110th player in Division I history to record over 2,000 career points and 1,000 career rebounds. Stony Brook won the America East regular season title for the second time in Warney's career with a 14–2 conference record. In the quarterfinals of the
2016 America East tournament, Warney scored 27 points and grabbed a career-high 23 rebounds in an 86–76 win over
UMBC. His 23 rebounds broke the record for most rebounds in an America East tournament game. He added another 21-point, 13-rebound double-double in the semifinals to advance Stony Brook to the championship game for the third season in a row. Down by 15 points in the second half to
Vermont, Warney scored 23 points on a perfect 11-for-11 shooting in the final 16 minutes of the game as Stony Brook came back to win 80–74, clinching the school's first NCAA Tournament bid in program history. Warney ended with both a career-high and single-game school record 43 points on 18-for-23 shooting; his 18 made field goals were also a new single-game school record. He was named America East tournament MVP for his heroics, averaging 30.3 points and 15.3 rebounds per game in the tournament. In the
NCAA tournament's round of 64, Stony Brook was given a 13-seed and faced 4-seed
Kentucky. The Seawolves lost 85–57, but Warney dropped 23 points and 15 rebounds to end his collegiate career with 60 career double-doubles. His 19.8 points per game, 655 points and 3.0 blocks per game are single-season Stony Brook records. ==Professional career==