| Chris Jorgensen | 6-5 | 205 | Fly, Free | - | Colorado Springs, CO | | 1999-2000 |
| Adam Justis | 5-11 | 155 | Breast, Free | - | Laramie, WY | | 1989-1990 |
| Juha Kaartinen | 6-2 | 175 | Free | - | Kuopio | | 1980-1982 |
| Tom Kafka | | - | Breast | - | Moraga, CA | | 1988-1989 |
| Tomislav Karlo | 6-2 | 167 | Back, IM | - | Slipt | | 1989-1993 |
| David Karlsson | 6-5 | 195 | Fly, Free, IM | - | Laholm | | 1998-1999 |
| Kelley Karren | 5-8 | 140 | Fly | - | Salt Lake City, UT | | 1991-1992 | 1994-1995 |
| Christian Keil | 5-11 | 175 | Back, Free | Senior | Hayward, CA | Mt. Eden High School | 2005-2006 | 2008-2011 |
| Daniel Kelly | 6-4 | 170 | Back | Mission | Vancouver, WA | Vancouver School of Arts and Academics | 2011-2012 |
| John Kendrick | 6-1 | 185 | Free | Senior | Plano, TX | Plano Senior High School | 2005-2006 | 2008-2011 |
| Ken Kenitzer | 6-3 | 185 | Diving | - | Pleasanton, CA | | 1988-1989 | 1991-1993 |
| Corey Killpack | 6-0 | 170 | Fly, IM | - | Magna, UT | | 1978-1979 | 1981-1984 |
| McKay King | 6-0 | 180 | Sprint | Freshman | American Fork, UT | American Fork High | 2010-2011 |
| Michael King | 6-0 | 185 | Breast | - | American Fork, UT | American Fork High School | 2011-2012 |
| Tom Kirk | 5-11 | 155 | Free | - | Salt Lake City, UT | | 1982-1983 |
| Evan Kirschner | 5-9 | 145 | Distance, Free | - | San Mateo, CA | | 1979-1981 |
| Casey Kleinman | 6-3 | 210 | Back, Free | - | Highland, UT | Lone Peak High School | |
| Jason Krause | 5-10 | 141 | Breast | - | Fort Worth, TX | | 1990-1994 |
| Ryan Krause | 6-2 | 180 | Fly, Free | - | San Diego, CA | Palomar Junior College | 2010-2012 |
| Brandt Kuykendall | 5-10 | 150 | Breast | - | Terra Linda, CA | | 1988-1990 |
| Spencer Lamareaux | 6-2 | 175 | Diving | - | Gilbert, AZ | Gilbert High School | 1996-1998 |
| Aaron Lancaster | 5-11 | 165 | Fly, Sprint | - | Moore, OK | Moore High School | 1995-1996 |
| Levi Larsen | 5-9 | 165 | Fly | - | Rochester Hills, MI | Rochester Adams High School | 1998-1999 | 2001-2004 |
| Paul Larsen | 5-10 | 160 | Free | - | Provo, UT | | 1980-1981 |
| David Larson | 6-2 | 210 | Free | - | Mesa, AZ | Mesa High School | 2000-2001 | 2003-2006 |
BYU Fan Store 
From the archives: Come Back, Jack
Softball signs transfer Mylee Davis
