In Michigan's November 6, 63–44 victory over Norfolk State, Brazdeikis debuted with 12 points in head coach John Beilein's 800th career win.
In his second game on November 10, during a 56–37 victory against Holy Cross, Brazdeikis added 19 points, including 15 points in the first five minutes to start the second half as well as seven rebounds.
On November 18, Brazdeikis helped Michigan defeat Providence 66–47 to win the Hall of Fame Tip Off tournament with a game-high 20 points and another 7 rebounds.
He repeated his 20-point, 7-rebound performance the next time out on November 23 against Chattanooga during their 83–55 victory.
Brazdeikis posted his third consecutive 20-point game on November 28, as Michigan defeated (#11 AP Poll/#13 Coaches Poll) North Carolina 84–67 in the ACC–Big Ten Challenge behind his career-high 24 points.

On December 1, Michigan defeated (#19/#18) Purdue 76–57 in its Big Ten Conference season opener.
Brazdeikis contributed 12 points.
On December 3, he was recognized as Big Ten Freshman of the Week for his performance against these two ranked teams.
Following a 23-point game against Northwestern and a 17-point performance against South Carolina, Brazdeikis was recognized as co-Big Ten Freshman of the Week on December 10.
On December 30, Michigan defeated Binghamton 74–52.
Michigan was led by Brazdeikis with a game-high 21 points.
The following day, he earned Big Ten Freshman of the week recognition for the third time in December.
On January 3, Michigan returned to Big Ten play with a 68–55 victory over Penn State powered by Brazdeikis' first career double-double (16 points and a career-high 11 rebounds).
On January 9, Brazdeikis was one of 7 Big Ten athletes included on the John Wooden Award Men's Midseason Top 25 watchlist.
On January 13, the 2018–19 Wolverines team defeated Northwestern to establish a school record for best start at 17–0 and tied the school's record 17-game win streak.
On January 19, Michigan lost to Wisconsin 64–54, as Brazdeikis went scoreless.
On January 22, Michigan defeated Minnesota 59–57 after a buzzer beater by Matthews.
Michigan was led by Brazdeikis with a game-high 18 points and career-tying 11 rebounds, for his second double-double of the season.
On January 25, Michigan defeated Indiana 69–46.
Michigan was led by Brazdeikis with a game-high 20 points, while Matthews added 10 points and a career-tying 11 rebounds for his sixth career double-double.
Michigan jumped out to a 17–0 lead and its defense allowed only 18 points in the first half, as Indiana shot a season-low 27.6% from the field during the game.
The 23-point victory marked the largest ever by Michigan on the road against Indiana.
On January 28, Brazdeikis earned his fourth Big Ten Freshman of the Week recognition for his performances against Minnesota and Indiana.
This surpassed Tim Hardaway Jr. and Nik Stauskas and established a new school record for most such awards.
On February 5, Brazdeikis was one of four Big Ten athletes named to the Wooden Award Late Season Top 20 Watch List.
That night, he made a career-high five three-pointers and scored a game-high 23 points as Michigan defeated Rutgers 77–65 and head coach John Beilein passed Johnny Orr for the most Big Ten wins as Michigan head coach with 121.
On February 7, Brazdeikis was one of two Big Ten athletes (along with Jordan Murphy) named a Karl Malone Award Top 10 finalist.

Following the season, he was a 2019 Second team All-Big Ten selection (coaches and media), the Big Ten Freshman of the Year (coaches and media) and a Big Ten All-Freshman honoree (coaches and media).
On March 12, the U.S. Basketball Writers Association named Brazdeikis to its 2018–19 Men's All-District V (OH, IN, IL, MI, MN, WI) Team, based upon voting from its national membership.
He was named to the National Association of Basketball Coaches Division I All‐District 7 second team on March 21, as selected and voted on by member coaches of the NABC, making him eligible for the 2019 NABC Coaches’ Division I All-America team.
He led Michigan in scoring (15.7 points per game) during i
In Michigan's November 6, 63–44 victory over Norfolk State, Brazdeikis debuted with 12 points in head coach John Beilein's 800th career win. In his second game on November 10, during a 56–37 victory against Holy Cross, Brazdeikis added 19 points, including 15 points in the first five minutes to start the second half as well as seven rebounds. On November 18, Brazdeikis helped Michigan defeat Providence 66–47 to win the Hall of Fame Tip Off tournament with a game-high 20 points and another 7 rebounds. He repeated his 20-point, 7-rebound performance the next time out on November 23 against Chattanooga during their 83–55 victory. Brazdeikis posted his third consecutive 20-point game on November 28, as Michigan defeated (#11 AP Poll/#13 Coaches Poll) North Carolina 84–67 in the ACC–Big Ten Challenge behind his career-high 24 points. 
On December 1, Michigan defeated (#19/#18) Purdue 76–57 in its Big Ten Conference season opener. Brazdeikis contributed 12 points. On December 3, he was recognized as Big Ten Freshman of the Week for his performance against these two ranked teams. Following a 23-point game against Northwestern and a 17-point performance against South Carolina, Brazdeikis was recognized as co-Big Ten Freshman of the Week on December 10. On December 30, Michigan defeated Binghamton 74–52. Michigan was led by Brazdeikis with a game-high 21 points. The following day, he earned Big Ten Freshman of the week recognition for the third time in December. On January 3, Michigan returned to Big Ten play with a 68–55 victory over Penn State powered by Brazdeikis' first career double-double (16 points and a career-high 11 rebounds). On January 9, Brazdeikis was one of 7 Big Ten athletes included on the John Wooden Award Men's Midseason Top 25 watchlist. On January 13, the 2018–19 Wolverines team defeated Northwestern to establish a school record for best start at 17–0 and tied the school's record 17-game win streak. On January 19, Michigan lost to Wisconsin 64–54, as Brazdeikis went scoreless. On January 22, Michigan defeated Minnesota 59–57 after a buzzer beater by Matthews. Michigan was led by Brazdeikis with a game-high 18 points and career-tying 11 rebounds, for his second double-double of the season. On January 25, Michigan defeated Indiana 69–46. Michigan was led by Brazdeikis with a game-high 20 points, while Matthews added 10 points and a career-tying 11 rebounds for his sixth career double-double. Michigan jumped out to a 17–0 lead and its defense allowed only 18 points in the first half, as Indiana shot a season-low 27.6% from the field during the game. The 23-point victory marked the largest ever by Michigan on the road against Indiana. On January 28, Brazdeikis earned his fourth Big Ten Freshman of the Week recognition for his performances against Minnesota and Indiana. This surpassed Tim Hardaway Jr. and Nik Stauskas and established a new school record for most such awards. On February 5, Brazdeikis was one of four Big Ten athletes named to the Wooden Award Late Season Top 20 Watch List. That night, he made a career-high five three-pointers and scored a game-high 23 points as Michigan defeated Rutgers 77–65 and head coach John Beilein passed Johnny Orr for the most Big Ten wins as Michigan head coach with 121. On February 7, Brazdeikis was one of two Big Ten athletes (along with Jordan Murphy) named a Karl Malone Award Top 10 finalist. 
Following the season, he was a 2019 Second team All-Big Ten selection (coaches and media), the Big Ten Freshman of the Year (coaches and media) and a Big Ten All-Freshman honoree (coaches and media). On March 12, the U.S. Basketball Writers Association named Brazdeikis to its 2018–19 Men's All-District V (OH, IN, IL, MI, MN, WI) Team, based upon voting from its national membership. He was named to the National Association of Basketball Coaches Division I All‐District 7 second team on March 21, as selected and voted on by member coaches of the NABC, making him eligible for the 2019 NABC Coaches’ Division I All-America team. He led Michigan in scoring (15.7 points per game) during i
Ignas Brazdeikis