As a Senior in 2012: No. 1 in Stanford career blocks in rally-scoring era (392) and No. 4 all-time in all eras ... tied for No. 1 in Stanford career blocks per set in rally-scoring era (1.10) No. 9 all-time in all eras ... No. 5 in Stanford single-season total blocks in rally-scoring era (101) ... No. 9 in Stanford single-season blocks per set in rally-scoring era (1.02) ... No. 6 in Stanford single-match blocks in rally-scoring era (9) ... NCAA Postgraduate Scholarship alternate ... member of Stanford's winningest senior class (career record: 86-33).
As a Junior in 2011: Started all 24 matches he played ... second on the team in blocks with 87 (10 solo, 77 assists), the No. 9 highest total in school annals in the rally-scoring era ... team-leader in blocks per set (0.97) - No. 10 on the Stanford season list ... had a season-high seven blocks along with four kills against Pacific (Feb. 2) ... holds the second-best career block total (291) for Stanford in the rally-scoring era, a total that placed him No. 8 in all eras ... his block on the opening point and four in the first set, set the tone in a four-set victory at Lewis (Feb. 4) ... reached the eight-kill mark twice on the season, ranking fifth on the team in kills ... had a total of 80 kills in 168 attacks, 12 digs, 9 assists and 2 aces ... named to the MPSF All-Academic team.
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As a Sophomore in 2010: Started all 29 matches he played ... team-leading blocker with 123 (29 solo, 94 assists), at 1.18 blocks per set ... had Stanford match high in blocks with nine, which he reached three times, including in the MPSF Tournament championship sweep of Cal State Northridge (May 1), in which had three solos ... had four consecutive blocks in the first set of that match, setting the tone ... had six performances of at least seven blocks, and two of three solos ... had eight block assists in NCAA semifinal sweep of Ohio State (May 6) ... had career-high 12 kills and only two errors (.385) at BYU (Jan. 23) in a match in which he had nine blocks ... had a total of 150 kills in 296 attacks, 26 digs, eight sets, and two aces ... named to the MPSF All-Academic team.
As a Freshman in 2009: Played in 21 matches, starting 14... had a team season-high 11 blocks (1-10) in five-set win over Long Beach State (Jan. 30) ... led the team in blocks per set with 1.27... totaled 81 blocks, the third-most on team ... twice had 10 kills, against Long Beach State (Jan. 9) and Lewis (March 7) ... averaged 1.20 kills per set.
International: Selected as an alternate the 2009 U.S. junior national training team ... helped the U.S. junior national team to third place in the NORCECA under-21 championships in El Salvador in July, 2008, qualifying for the 2009 junior world championships in India ... member of U.S. youth national team in 2006 and 2007.
High School/Club: Won two CIF Southern Section Division II titles (2005, 2007) at Corona del Mar High School in Newport Beach, Calif. ... regarded by many as the nation's top middle blocker in the class of 2008 ... two-time Southern Section Division II first-team choice ... two-time Daily Pilot Dream Team selection for Los Angeles County's South Bay area ... Pacific Coast League MVP in 2008 when he had 237 kills, 73 blocks and 37 digs ... had 300 kills and 79 blocks as a junior, including 20 kills in section final victory ... helped the Balboa Bay Volleyball Club to a Junior Olympic championship in 2008 ... coached at Balboa Bay by ex-Stanford star and 2008 Olympic gold medalist Kevin Hansen ... two-time Junior Olympic all-tournament selection.
Personal: Son of Mark and Shelly Ellis ... has two sisters, Hilary and Whitney ... father played tight end at Harvard ... Hilary was on the crew team at Penn ... like his club coach Kevin Hansen, Ellis has excelled despite having Type 1 diabetes ... given name is Austin Gregory Ellis ... used to drink so much water as a youngster that he was given the nickname, "Guzzling Gus," which was since shortened to "Gus" ... majoring in political science.
Career Stats:
| Year | MP-MS | GP | K | E | TA | PCT | A | SA | DIG | BS | BA | TOT |
| 2009 | 21-14 | 64 | 77 | 15 | 173 | .358 | 2 | 3 | 8 | 9 | 72 | 81 |
| 2010 | 29-29 | 104 | 150 | 37 | 296 | .382 | 8 | 2 | 26 | 29 | 94 | 123 |
| 2011 | 24-24 | 90 | 80 | 21 | 158 | .351 | 9 | 2 | 12 | 10 | 77 | 87 |
| 2012 | 27-25 | 99 | 102 | 18 | 180 | .467 | 6 | 3 | 26 | 15 | 86 | 101 |
| Totals | 101-92 | 357 | 409 | 91 | 807 | .394 | 25 | 10 | 72 | 63 | 329 | 392 |