Scott Weltz is one of Davis' Olympic athletes, competing in the 2012 Olympics in the 200m breaststroke. Many Davisites contributed to a fund to send Weltz to the Olympics. He was 7th in the heats, qualifying him for the semifinals; 4th in the semifinals, qualifying him for the finals; and then 5th in the finals.

Weltz was a member of the now-defunct Men's UC Davis Swimming and Diving Team. He wore a UC Davis Aggies t-shirt at the news conference following his win at the U.S. Olympic trials, perhaps hoping to spur the reincarnation of the team. Weltz is coached by Pete Motekaitis, former coach of the men's UCD team and now associate head coach of the women's team; sometimes Weltz trains with the women, but many times it's just him and Motekaitis. His story inspired an LA Times article, in which Weltz says he's going to keep swimming after the 2012 Olympics and see how far he can go.

As a UC Davis student-athlete, Weltz won the Big West Conference Male Athlete of the Year honors in both 2009 and 2010. He also was co-winner of the 2010 Colby E. 'Babe' Slater Award as UC Davis' outstanding male athlete of the year.

Weltz is an assistant coach for the AquaMonsters Swim Team.