| Kevin Leichner | 6-3 | 175 | Back | - | Portland, OR | | 1977-1980 | 1983-1984 |
| Poon Kah Leong | 5-9 | 156 | Fly | - | Singapore | | 1988-1991 |
| Randy LeTellier | 5-10 | 165 | Diving | - | Wauwatosa, WI | | 1970-1971 | 1974-1975 |
| Ryan Lifferth | 6-0 | 158 | Fly, Free | - | Layton, UT | | 1991-1992 |
| Terrence Lim | 5-8 | 150 | Distance | - | Patrick's Garden | | 2000-2004 |
| David Lim | 6-0 | 165 | Back, Free, IM | - | Singapore | | 1984-1987 |
| Jeff Linden | 5-11 | 168 | Breast, Fly, IM | - | El Paso, TX | | 1980-1981 |
| Victor Lindsay | 6-3 | 205 | Back | - | Harvey, IL | | 1965-1966 |
| Terry Livingston | 6-0 | 165 | Breast, IM | - | Regina | | 1985-1989 |
| Ron Lockwood | 6-2 | 190 | Distance, Free | - | Stockton, CA | Fresno State | 1994-1996 |
| Robert Loose | 6-2 | 195 | Fly | - | Puyallup, WA | Woodrow Wilson High School | 1992-1993 | 1995-1998 |
| John Lowry | 6-2 | 175 | Breast, IM | - | Manteca, CA | | 1994-1995 | 1997-2000 |
| James Lowry | 6-0 | 175 | Back, IM | - | Fairbanks, AK | | 1972-1975 |
| Dewey Lucero | 5-9 | 160 | Fly, IM | - | Corning, CA | | 1998-2000 |
| Fred Mabey | 5-11 | 175 | Back | - | Bountiful, UT | | 1972-1974 |
| John Malfatt | 5-9 | 165 | Back, IM | - | Louisberg, KS | Blue Valley High School | 1998-1999 | 2001-2005 |
| Dmitri Malinovski | 6-3 | 195 | Breast | - | Moscow | | 1996-1999 |
| Kanui Manley | 5-10 | 170 | Free | - | Wahiana, HI | | 1982-1983 |
| Terry Martin | 5-11 | 165 | Breast, Free, IM | - | Magna, UT | | 1972-1974 |
| Jim Martin | 5-9 | 160 | Diving | - | Berwyn, IL | | 1974-1975 |
| Jeffrey Mason | 6-2 | 195 | Free | - | Mesa, AZ | Westwood High School | 1997-1998 | 2000-2003 |
| David Mason | 6-3 | 220 | Breast, Free, IM | - | Mesa, AZ | Mountain View High School | 2003-2004 | 2006-2010 |
| Danny May | 6-5 | 170 | Back, Sprint | - | Hemet, CA | | 1984-1986 | 1988-1989 |
| Bryan McCleve | 5-10 | - | Diving | - | Los Gatos, CA | | 1983-1984 |
| John McCleve | 5-9 | 145 | Diving | - | Montecerno, CA | | 1984-1985 | 1987-1988 |