Christian Coleman clocked a world-leading 9.82 in the opening round of the 100m to highlight the opening day of the NCAA Championships in Eugene on Wednesday (7).
The mark elevated Coleman, 21, to equal ninth on the all-time world list, and fourth fastest all-time among US sprinters.
"The sky's the limit as far as how fast I think I can run," said Coleman, whose previous best of 9.95 was set last year on the same Eugene track. "I just wanted to come out here and execute and make it to the final. I wasn't looking for a time or a record."
Coleman, a student at the University of Tennessee, nonetheless broke one as his performance eclipsed the previous collegiate record of 9.89 set by Zimbabwe's Ngonidzashe Makusha in 2011.
Each of the three 100m semis produced fast times. Cameron Burrell of the University of Houston and Christopher Belcher of North Carolina A&T University both clocked lifetime bests of 9.93 to win the second and third heats, respectively. The 100m final is scheduled for Friday.
Coleman, this year's NCAA indoor 60m and 200m champion, also advanced to Friday's final in the 200m, clocking 20.21, but he wasn't the fastest. Belcher sped to a 20.01 win in the third semi-final, beating Coleman to the line. Jereem Richards of Trinidad and Tobago, who competes for the University of Alabama, won the first semi in 20.04.
Coleman is also the current world leader in the 200m at 19.85 set in Lexington on 27 May.
In other opening day action, Croatia's Filip Mihaljevic, competing for the University of Virginia, won the shot put with a 21.30m personal best.
KeAndre Bates led a 1-2 for the University of Florida in the men's long jump with 8.05m, edging teammate Grant Holloway who reached 8.00m.
Ioannis Kyriazis of Greece and Texas A&M University won the javelin with 82.58m. Matthew Ludwig of the University of Akron won the pole vault at 5.60m.
Victor takes decathlon title, collegiate hammer throw record for Ewen - day two action
Moving up from third after the first day, Lindon Victor of Grenada and Texas A&M, won the decathlon with 8390. Victor twice improved the NCAA record in the event this season, most recently to 8539 on 13 May.
Devon Williams from the University of Georgia was second with 8181, with German Luca Wieland, a student at the University of Minnesota, third with 8146.
The highlight in women's action, which kicked off on Thursday (8), came in the hammer throw where Maggie Ewen of Arizona State University threw a 73.32m collegiate record, eclipsing the 72.94m mark set by Jenny Dahlgren in 2007.
The long featured fierce competition for each of the podium spots. Kate Hall edged University of Georgia teammate Keturah Orji 6.73 to 6.71 (w +2.2) to take the victory. Likewise, Sydney Conley of the University of Kansas beat Jhoanmy Luque of Iowa State by just two centimetres with 6.56m to finish third.
Other titles on the infield went to Olivier Gruver of Kentucky who topped 4.50m in the pole vault and Daniel Thomas of Kent State who won the shot put with 19.15m.
Chrisann Gordon of the University of Texas dominated the opening round of the 400m with 50.39. Oregon's Deejah Stevens was the quickest in the 200m semis at 22.31. And in the 100m, Teahna Daniels of Texas, Aaliyah Brown of Texas A&M and Mikiah Brisco of LSU led all qualifiers in the 100m with 11.17, 11.18 and 11.19 respectively.
Bob Ramsak for the IAAF