AT COLORADO: This Season (Jr.)-Enters the fall as one of four players in a most competitive deadlock at tailback.  More than one will play, but the camp battle will be who fights for the most playing time and what else their different skill sets can provide.  He enters his junior year ranked 75th in rushing yards at Colorado with 586.  He has proven to be most reliable in holding on to the football: he has not fumbled in 194 career touches at the midway point of his college career.

2008 (Soph.)-He played in all 12 games, making seven starts, as he was utilized in a variety of ways.  He rushed 63 times for 251 yards (4.0 per) and four touchdowns, coming  alive the final two games of the year.  He rushed 22 times for 86 yards and a score against Oklahoma State, and then rambled for 65 yards and two scores on just nine carries at Nebraska.   He enjoyed his career long run of 36 yards against the Huskers, which went for a touchdown and put CU up 14-0 early in the game.  He was fifth on the team in receiving with 18 catches for 167 yards (9.3 per), with highs of five grabs for 40 yards against Iowa State.  His long career reception was also for 40 yards, which he had the previous week at Texas A&M.  He earned 21 first downs, 14 via rushing.  The coaches honored him with the Gold Group Commitment Award, given to those players committed to all-around excellence.  He proved his versatility in the spring as evidenced by rushing for 139 yards and touchdown with eight catches for 113 yards and two scores in the three main scrimmages.  The coaches selected him as the Fred Casotti Award winner as the most improved offensive back during spring practice.

2007 (Fr.-RS)-He played in 12 games including the Independence Bowl with three regular season starts, finishing second on the team in rushing with 335 yards (on exactly 100 carries, or 3.4 per).  He scored four touchdowns via rushing, when he had 24 carries exceed five yards and eight longer than 10; he also caught six passes for 41 yards and a score.  He ranked 23rd in the Big 12 in rushing (27.9 per game).  He earned 15 first downs, five on third down.  Top games included Miami-Ohio (14 for 91, 1 TD), Colorado State (16-85-1) and Baylor (15-38-2). 

2006 (Fr.)-Redshirted; he practiced the entire fall at tailback and was a solid scout team performer.

HIGH SCHOOL-A PrepStar All-West team member, Rivals.com ranked him as the No. 48 running back in the nation (and the No. 98 overall prospect in California), while Scout.com penciled him in at No. 87.  SuperPrep selected him to its All-Far West team, ranking him as the No. 97 player in California.  A four-year letterman at Cathedral Catholic (formerly University High School), he completed his prep career as the San Diego area's all-time leading rusher, with 5,696 yards, as well as scoring a combined 67 career touchdowns.  He broke the record of 5,367, set by former University star Justin Green (who went on to star in the NFL with the Baltimore Ravens).  He garnered a slew of accolades his senior year, including first-team all-state, All-CIF (North County) and All-Eastern League honors. He repeated as both the Eastern League Offensive Player of the Year and the National Football Federation most valuable player, while also being selected the North County Player of the Year.  As a senior, when he was his team MVP for a second time, he had 308 carries for 2,467 yards and 31 touchdowns, along with 15 receptions for 250 yards and a score.  As a junior, when he was first-team All-Eastern League and second-team all-state and University's MVP, he had 212 attempts for 1,715 yards and 22 touchdowns and hauled down 35 catches for 467 yards and three TDs.  He was named second-team all-league and National Football Federation MVP in his sophomore season in which he had 165 carries for 1,114 yards and 13 touchdowns, and as a freshman, he totaled 400 yards and one touchdown on 73 carries.   Top games as a senior: in a win over Scripps Ranch, he had 29 carries for 360 yards and five touchdowns; in a win over Morris, he had 21 attempts for 229 yards and five scores-all in the first half; and in a win over Monte Vista, had had 350 all-purpose yards, including 267 rushing to go with four touchdowns.  Under coach Sean Doyle, Cathedral Catholic was 8-4 his senior year, losing in the CIF semifinals; as a junior, the school was then known as University, and was 10-2, also losing in the state semis.  He lettered four times in basketball, earning first-team All-Eastern League honors as a junior and senior.

ACADEMICS-He is majoring in Economics at Colorado.  He owned a 3.0 grade point in high school.

PERSONAL-Born January 30, 1988 in San Diego, Calif.  Hobbies include playing basketball, roller-skating and playing video games.  His father (Robert Sumler, Jr.) played basketball for Washburn and won the NAIA national championship in 1986.  A cousin (Teddy Lawrence) played football at UCLA in the early 1990s.  An uncle (Frank White) is the manager for former Denver Broncos running back Terrell Davis.  He has volunteered over the summer at eighth grade football and basketball camps in the San Diego area.  He has met Rashaan Salaam, as the former CU legend lives next to his grandparents in San Diego.  He played Pop Warner football, and is mutual friends with former USC tailback Reggie Bush.  Sumler aspires to own his own business after college if he does not play in the NFL.