One veteran sprinter has been swapped for another on the American roster for the 2012 Short Course World Championships, as Olympian Kara Lynn Joyce is out, and Christine Magnuson is in.
Magnuson has plenty of international experience on her resume, having made the squad for the season's major championship team every year from 2008 through 2011. That includes a pair of silver medals at the 2008 Summer Olympics in Beijing and a gold medal from last year's World Championships as a prelims swimmer on the 400 medley relay.
The vast majority of that swimming, though, has been as a butterflier, and she heads to Istanbul instead as a sprint butterflier: she was the 3rd-place finisher at the Olympic Trials in the 50, and thus will get Joyce's spot there. In finals of that race in Omaha, Joyce charged hard to the finish to pick off Magnuson by .05 seconds.
The new updated roster is below, with asterisks (*) denoting 2012 Olympians:
| Women | ||
| Name | Event | Club |
| Ellyn Baumgardner | 50/100 breast | Curl Burke Swim Club/Arizona |
| Bonnie Brandon | 200 back | Mission Aurora Colorado Swimming |
| Chelsea Chenault | 4×200 free relay | Terrapins Swim Team |
| Maya Dirado | 100/200/400 IM | Stanford Swimming |
| Claire Donahue* | 50/100 fly | Western Kentucky University |
| Jessica Hardy* | 50/100 free, 50/100 breast | Trojan Swim Club |
| Kathleen Hersey* | 50/100/200 fly | Longhorn Aquatics |
| Andrea Kropp | 200 breast | Rattler Swim Club/USC |
| Becca Mann | 400 IM, 800 free | Clearwater Aquatic Team |
| Christine Magnuson | 50 free | Tucson Ford Dealers Aquatics |
| Melanie Margalis | 100/200 IM | St. Petersburg Aquatics |
| Lia Neal* | 4×100 free relay | Asphalt Green Unified Aquatics |
| Megan Romano | 100/200 free, 50/100/200 back | Athens Bulldog Swim Club |
| Allison Schmitt* | 200/400 free, 4×100 free relay | North Baltimore Aquatic Club |
| Olivia Smoliga | 50/100 back | Glenview Titan Aquatic Club |
| Laura Sogar | 200 breast | Bluefish Swim Club/Texas |
| Chloe Sutton* | 400/800 free | Mission Viejo Nadadores |
| Jasmine Tosky | 200 fly | Palo Alto Stanford Aquatics |
| Shannon Vreeland* | 4×200 free relay | Athens Bulldog Swim Club |
| Men | ||
| Mike Alexandrov | 50/100 breast | Trojan Swim Club |
| Bobby Bollier | 200 fly | Stanford Swimming |
| Clark Burckle* | 200 breast | Tucson Ford Dealer Aquatics |
| Kevin Cordes | 50/100 breast | University of Arizona |
| Conor Dwyer* | 100/200 IM, 200/400 free | Lake Forest Swim Club/Gator |
| Mark Dylla | 200 fly | Athens Bulldog Swim Club |
| Anthony Ervin* | 50 free | California Aquatics |
| Ryan Feeley | 1500 free | University of Michigan |
| Jimmy Feigen* | 100 Free, 4×100 free relay | Longhorn Aquatics |
| Matt Grevers* | 100 free, 50/100 back | Tucson Ford Dealer Aquatics |
| Ben Hesen | 50/100 back | Pacesetter Aquatics/Gator |
| Michael Klueh | 400 free, 4×200 free relay (added after Houchin dropped) | FAST Swim Team |
| Ryan Lochte* | 200 free, 200 back, 50/100 fly, 100/200 IM | Daytona Beach Swimming/Gator |
| Michael McBroom | 1500 free | The Woodlands Swim Team/Texas |
| Matt McLean* | 4×200 free relay | FAST Swim Team |
| Ryan Murphy | 200 back | Bolles School Sharks |
| Tyler Reed | 4×100 free relay | Southern Kentucky Swim Club |
| Tom Shields | 50/100 fly | California Aquatics |
| Josh Schneider | 50 free | SwimMAC Carolina |
| Steven Schmuhl | 400 IM | Indiana University |
| Garrett Weber-Gale | 4×100 free relay | Longhorn Aquatics |
| Scott Weltz* | 200 breast | Marin Pirates |
| Michael Weiss | 400 IM | Wisconsin Aquatics |