In Big Ten play, he averaged just 6.1 points and 2.1 rebounds per game, but shined in some of NU's biggest games. Against ninth-ranked Wisconsin, his 3-pointer with 7:44 left keyed a decisive 12-2 spurt as the Huskers knocked off the Final Four-bound Badgers. At Indiana on March 5, Gallegos provided a spark with consecutive 3-pointers in the second half, helping NU take a five point lead to 11 points in a crucial road win over the Hoosiers. He finished in double figures five times in conference action, including 14 points on 4-of-10 shooting from long range in a one-point loss to eventual Big Ten champion Michigan on Jan. 9.
Gallegos began his senior campaign with 18 points, including a season-high six 3-pointers, against South Carolina State on Nov. 17. It was one of four double-figure efforts during non-conference action. He also had 11 points in the Charleston Classic against Georgia, 13 points and four assists against Arkansas State on Dec. 14 and 18 points, including four 3-pointers and three assists at Cincinnati. In his final five non-conference games, Gallegos averaged 9.4 points, 3.2 assists and 2.8 rebounds per game with an outstanding 16-to-1 assist-to turnover ratio in that stretch.
Gallegos closed conference play with two of his highest scoring efforts of the season, totaling 23 points at Illinois on March 2 before adding 22 points, including a career-high seven 3-pointers in the regular-season finale at Iowa on March 9. Gallegos, who finished 16th in Big Ten play with 12.6 ppg, reached double figures in 12 of 18 Big Ten contests, including a career-high 30-point effort at Minnesota on Jan. 29. In that game, he hit 6-of-9 from 3-point range and became the first Husker guard to score 30 or more points in a game since Tyronn Lue in 1998. He also had 19 points in a loss at No. 2 Michigan on Jan. 9, one of four straight games in double figures to open Big Ten action. That was one of six times Gallegos led NU in conference play, including each of the Huskers' first three Big Ten contests. Against Northwestern on Jan. 26, he scored 11 of his 13 points in the second half, including a pair of 3-pointers in an 11-2 spurt to put the game away.
Gallegos began his junior campaign with a then-career-high 16 points on 7-of-11 shooting against Southern, beginning a stretch where he tied or set career bests in scoring three times in NU's first six games. He propelled the Huskers to a win at Wake Forest in the Big Ten/ACC Challenge on Nov. 27, scoring 17 of his 20 points in the second half on 7-of-8 shooting from the floor. Against USC on Dec. 3, Gallegos tied his career best with 20 points for the second straight game and set a personal best with six 3-pointers. He scored NU's final 11 points of the half, to give the Huskers a 12-point lead. After a three-game slump where he averaged 6.7 ppg, Gallegos regained his shooting touch at the Sun Bowl Invitational, averaging 20.5 ppg, 2.5 apg, and 2.9 rpg in two games to earn a spot on the five-member all-tournament team. Gallegos got off to a quick start in the opening minutes of the tournament opener against Central Michigan on Dec. 22, when he scored 11 of the Huskers' first 16 points and finished with 19 points to help NU to its highest offensive total in nearly three years in an 89-7 win. In the title game against UTEP, Gallegos provided one of the few bright spots, scoring a career-high 22 points on 9-of-15 shooting. He had 17 second-half points as NU trimmed a 20-point halftime deficit to 11 points with 3:09 left.
Gallegos struggled with his shooting in Big 12 play, hitting just 5-of-27 shots from the floor in 11 contests. His best offensive effort in Big 12 action came at Kansas State on Feb. 2, when he had five points in 10 minutes off the bench, but his biggest contribution came in the conference opener against Iowa State when he guarded Diante Garrett on the final possession and combined with Lance Jeter on a steal that led to Jeter's game-winning free throw with 0.7 seconds left.
Gallegos scored in double figures twice on the year, posting a season-best 13 points against Texas-Pan American and 10 points against Creighton in back-to-back contests. He hit 4-of-7 shots from the field, including a season-high three 3-pointers against UTPA, and nailed 4-of-5 field-goal attempts while adding three rebounds against Creighton.
After missing the first two regular-season games with injury, Gallegos' solid work in games and practice helped him earn three starts. He drew starting assignments against Jackson State, Tulsa and BYU, helping NU to a 2-1 mark in those contests. Gallegos was one of a school-record five freshmen to start for NU during the season. He helped set the school single-game mark with three freshmen in the starting lineup against BYU.
During league play, two of his best games came on the road at Missouri and nationally ranked Kansas State. He scored eight points in each contest, including combining for four 3-pointers. Gallegos' performance against KSU was his second consecutive solid game after posting five points on 2-of-4 shooting in 20 minutes at nationally ranked Texas.
In the state title game, he played a primary role as the Jaguars forced the reigning state player of the year, Tyler Haws, into one of his worst shooting nights of his career. Gallegos also had four treys - including consecutive 3s in a 64-second span - to help his team earn the gold and earn all-tournament team honors. On the season, Gallegos averaged 16.7 points per game to rank sixth in the state in scoring, as the Jaguars went 21-4. He had nine games with at least 20 points, including a season-best 31 points and added 22 points in the state championship game. Gallegos was second in the state in 3-point field-goals per game, hitting a school-record 66 3-pointers in 2008-09. He had a season-best six 3-pointers against Kearns, and five treys in four other games. He also helped West Jordan High School to the state tournament as a junior, averaging 10.5 points per game over 21 contests.
Gallegos really came on during the 2008 summer AAU circuit when he was playing for the Utah Pump-N-Run White. Gallegos averaged about 25 points per game, according to Coach Brad Blanchfield. Gallegos was rated the No. 53 shooting guard in the country by Scout.com and was tabbed the No. 7 shooting guard on the West Coast following the summer.