2023 Redshirt Senior:

• Started in all 13 games, totaling 120 tackles, 4.0 tackles for loss, 1.0 sack, one interception, two passes broken up, and two forced fumbles
• Named to the All-Big Ten Second Team and Academic All-Big Ten
• Served as a team captain
• Led the team and ranked second in the Big Ten in tackles, and posted five games with 10+ tackles
• Ranked 21st in the country averaging 9.2 tackles per game
• Became the first Wildcat to have 120+ tackles and 4.0+ tackles for loss in a single season since his older brother Blake Gallagher in 2018
• Registered a career-high 19 tackles in the season opener against Rutgers (9/3) … Recorded the most tackles in a single game by a Wildcat since Anthony Walker had 19 stops against Duke on September 19, 2015
• Notched second career interception against UTEP (9/9) … Gallagher and LB Xander Mueller became the first duo of Northwestern linebackers to record interceptions in the same game since Dec. 12, 2020, against Illinois
• Logged a game-high 13 tackles and a season-high 1.5 tackles for loss against Duke (9/16)
• Had a game-high seven tackles against Penn State (9/30)
• Posted 37 tackles over the season’s first three games, the most by a Wildcat over that span since at least 2000
• Posted seven tackles in back-to-back games against Minnesota (9/23) and Penn State (9/30)
• Registered nine tackles, 1.0 tackle for loss, one pass broken up, and one forced fumble against Nebraska (10/21)
• Recorded six tackles, 1.0 sack, and forced and recovered a fumble in the win over Maryland (10/28)
• Made 10 tackles in road victory at Wisconsin (11/11)
• Had a game-high 14 tackles in last game at Ryan Field in a win over Purdue (11/18)
• Helped Northwestern win the Las Vegas Bowl over Utah with 10 tackles (12/23)

2022 Redshirt Junior:

• Started and played in 11 games, recording 100 tackles, 5.0 tackles for loss, 1.5 sacks, an interception and a forced fumble
• Ranked fifth in the Big Ten and led the team in tackles
• Became the first Wildcat to record 100 tackles and at least 5.0 tackles for loss in the same season since his brother Blake in 2018
• Led the team with 10 tackles, and tied a career-high with nine solo tackles in a win over Nebraska (8/27)
• Led the team totaling 12 tackles, 1.0 tackle for loss, one pass defended and blocked the team’s first field goal since 2019 and returned it 52 yards against Southern Illinois (9/17)
• Made a game-high 13 tackles and tied his career-high nine with nine solo stops against Miami (OH) (9/24)
• Posted 12 total tackles, six solo tackles, one forced fumble and his first career interception against Penn State (10/1)
• Became the first Wildcat to record 10+ tackles, one interception and one forced fumble in the same game since 2011
• Set multiple career-highs logging 16 tackles, 2.5 tackles for loss and 1.0 sack against Maryland (10/22)
• Became the first Wildcat to tally 15+ tackles and 2.5+ tackles for loss in a game since Tim McGarigle in 2005
• Totaled nine tackles, seven solo, against Iowa (10/29)
• Notched seven total tackles, five solo, against Ohio State (11/5)
• Made a game-high 10 tackles against Purdue (11/19)

2021 Redshirt Sophomore:

• Finished 15th in the Big Ten with 89 total tackles
• Accumulated 54 solo tackles, ranking second on the team 
• Appeared in all 12 games and made 10 starts
• Phil Steele Preseason All-Big Ten (Fourth Team) 
• Tallied five tackles, including a tackle for loss in a win over Indiana St. (9/11) 
• Registered seven tackles against Duke (9/18) 
• Recorded a career-high ten tackles against Nebraska (10/2) 
• Became first player since Anthony Walker in 2015 to record 10 tackles, 2.5 tackles for loss, and a sack in a single game to help defeat Rutgers (10/16)
• Broke his previous career-high with 14 tackles against Michigan (10/23)
• Racked up 11 tackles, including a TFL, against Minnesota (10/30)
• Tallied nine tackles and a TFL against Iowa (11/06)

2020 Redshirt First-Year: 

• Made an appearance in every game
• Recorded a career-high three total tackles vs. Illinois (12/12)

2019 First-Year: 

• Picked up seven total tackles including 0.5 tackles for loss in a win over UNLV (9/14)
• Contributed 11 total tackles and 0.5 tackles for loss against Ohio State (10/18) 
• Set two career-highs with 12 total tackles and two tackles for loss at Indiana (11/2), his third straight game with double-digit tackles

High School: 

• Three-star prospect verbally committed to Northwestern on Sept. 27, 2017
• No. 4 player in the state of Massachusetts (247sports) 
• Team Captain 
• Finished high school career with 210 tackles, 32 tackles for loss, 11 sacks and seven interceptions
• Earned All-League Independent School League and All-New England Honors 
• Led St. Sebastian’s to a 2018 ISL title with a 7-2 record 
• Tallied 23 tackles and a pair of sacks, while rushing for 205 and two scores in the Tod Marble Bowl 
• Earned All-ISL Honorable Mention in football and basketball as a sophomore 
• Named to the Boston Herald All-Scholastic Team 
• Honor Roll Student all four years of high school 
• Older brother Blake played for Northwestern and father Michael played football at New Hampshire 
• Chose Northwestern over offers from Boston College, Duke, Vanderbilt and Army