Bergersen is 2nd all-time in scoring average for a season (1998-99). He also places fifth for his 1997-98 season (19.4). Roberto is one of only three Broncos in history to score 500 or more points in two different seasons—Tanoka Beard scored over 500 in three different seasons and Abe Jackson did it twice. He posted similar rankings for field goals made (2nd in '98 and 4th in '97) and field goal attempts (3rd in '98 and 7th in '97). Bergersen ranks 3rd in free throw percentage during his senior season, when he canned 85.6%, shooting 125 of 146. He is also fifth and seventh in three-pointers in a season, fourth in three-point attempts (1998-99), 10th in free throws made in a season (125 during his senior season) and 10th in steals, when he swiped 54 during his senior year. Bergersen is tied for the Bronco record with 30 games started his junior year and tied for fourth in games played. In 1998-99, he joined Ron Austin as the only Broncos to score 600 points in one season, when set an all-time record with 644. His 582 points during his junior year ranks third.
Bergersen's 1998-99 team is tied for fourth for the best Boise State season with 21 wins. In his initial season at Boise State, Bergersen helped the Broncos set an all-time record for defense, holding opponents to just 1,678 points for the season. Bronco opponents scored just 62.1 points per game that year, which ranks fifth all-time. That same year, his Broncos set the all-time record for three-pointers, when they sent 223 howitzers into the basket. The following year, Boise State made another 221 for 2nd and in Bergersen's senior year, they canned 172 for fifth all-time. In his sophomore season, Bergersen and Boise State set an all-time record by allowing the fewest blocked shots by the opposition, just 44 the entire year. During Bergersen's career, Boise State ranked second in limiting opponents to just 1,236 field goal attempts and in opposition assists (283) his sophomore year, third in three-point attempts for the opposition in his junior year and second in opposition rebounding average (30.5), third in scoring average-defense (61.7 points per game), fourth in steals (277) his senior season.
Roberto led the Broncos in scoring in both his junior and senior seasons, free throw percentage (85.6%) and steals (54) his senior year and in field goal percentage (51.4%) his junior year.
When he came to Boise State, he instantly improved the Broncos' ability to create plays inside. The Broncos were 14-13 overall and 9-7 in the Big West during their first season since moving from the Big Sky. Bergersen and the Broncos won the Albertson's Holiday Classic by beating Gonzaga 73-64 and also downed BYU in Provo 65-58 and shocked Pepperdine 65-52. They lost narrow contests to Pac-10 teams at both Oregon (61-58) and Washington State 74-59. Boise State also defeated Eastern Michigan 73-61 on ESPN. Boise State was upset in the first round of the Big West Tournament by Pacific 68-52.
Boise State was 17-13 his first year, 9-7 in the Big West, including a 83-67 win over BYU, a 79-72 victory over Washington State of the Pac-10, an 83-60 win over Weber State. Other impressive wins came against New Mexico State (71-59), Nevada (77-67) and Utah State (57-49). Boise State nearly pulled off a shocker in Westwood, leading the hometown UCLA Bruins the entire game before falling 81-75 at the end. The Broncos were upset in the first round of the Big West Tournament again, falling to Cal-State Fullerton 89-82.
The following season, Bergersen led the Broncos to a 21-8 record (12-4 in the Big West) to capture the Big West East Division Championship. It was Boise State's first title since 1994. The Broncos downed #17 Washington 69-61 in the Pavilion in 1998, one of three wins over a Top 25 team in Bronco history. Bergersen and Boise State lost to two ranked teams (Indiana and Gonzaga) that year. The Broncos also blitzed Nevada (77-52) and defeated the West Division Champion New Mexico State Aggies twice (67-48 and 70-48) only to lose to them in the Big West Tournament Championship. Despite their sparking 21-8 record and tough schedule, Boise State was left out of not only the NCAA Tournament but the National Invitation Tournament as well.
Bergersen was honored as a First-Team All-Big West Conference selection in both 1998 and 1999, and was chosen as the Big West Conference Player of the Year in 1999. He was also selected as the Tournament Most Valuable Player in 1999. Roberto was selected in the second round of the National Basketball Association Draft by the Atlanta Hawks. He played in the NBA Summer League with both Portland and Sacramento and was also on the Milwaukee Bucks roster briefly. He is currently with the Boca Juniors of Argentina. He has played with various European teams including Cholet (France) Dongbu (Korea), Palma Aqua (Spain), Karsiyaka (Turkey) and Melilla (Spain). While with Karsiyaka, Bergersen made the Turkish League All-Star team. He his averaging 13.5 points per game in his European career.
Roberto averaged 7.7 points and 2 assists per game with the Idaho Stampede in 1999-2000 and played in the All-Rookie game. The following year, he played with the Stampede and averaged 14.6 points, four rebounds and 2.8 assists per game. Bergersen came back for another season with the Stampede in 2003-2004, averaging 16.0 points, 2.6 rebounds, three assists and 1.3 steals per game while leading the team to the CBA Finals. Bergersen also played with Dodge City of the United States Basketball League in 2004, averaging 17.4 points, 3.9 rebounds, 2.8 assists and 1.1 steal per game and helping Dodge City to the USBL Semifinals. Bergersen was named to the USBL All-Star team that season.