| Glen Roberts | 6-5 | 220 | RHP | - | Bingham, UT | | 1977 | 1979 |
| 28 | Curtis Rodriguez | 6-0 | 195 | RHP | - | Laguna Niguel, CA | Capistrano Valley High School | 1999 | 2002-2003 |
| Richard Rolapp | 6-1 | 182 | RHP | - | Beverly Hills, CA | | 1960 |
| Brandon Romney | 6-1 | 180 | RHP | - | Dallas, TX | Woodrow Wilson High School | 2005 |
| Bill Russon | 5-11 | 190 | RHP | - | Los Angeles, CA | | 1960 |
| 23 | Ron Saffell | 5-11 | 165 | RHP | - | Carson, CA | | 1983-1984 |
| 33 | Cade Schaerrer | 6-2 | 195 | RHP | - | Orem, UT | | 1993-1998 |
| 23 | Jeff Schultz | 6-0 | 185 | RHP | - | Long Beach, CA | | 1995 |
| 26 | Bryce Searle | 6-3 | 215 | RHP | - | Spanish Fork, UT | Spanish Fork High School | 2000 | 2003-2004 |
| 37 | Daniel Sechrest | 6-8 | 220 | RHP | Sophomore | Highland, UT | Lone Peak High School | 2011-2012 |
| 26 | Craig Seegmiller | 6-5 | 200 | RHP | - | St. George, UT | | 1984-1986 |
| 23 | Terry Sheehan | 6-2 | 185 | RHP | - | Boise, ID | | 1973-1974 |
| Jack Shipp | 6-0 | 170 | RHP | - | Joseph, UT | | 1958-1959 |
| 33 | Justin Shutt | 6-2 | 205 | RHP | - | Oxnard, CA | Oxnard High School | 2008-2011 |
| 32 | John Sinclair | 6-1 | 175 | RHP | - | Dana Point, CA | Saddleback Junior College | 1987-1988 |
| Owen Skousen | 6-0 | 190 | RHP | - | Mesa, AZ | | 1956-1957 |
| Bob Smith | 6-0 | 180 | RHP | - | Van Nuys, CA | | 1956 |
| 19 | Craig Smith | 6-2 | 180 | RHP | - | Salt Lake City, UT | | 1996-1997 |
| 30 | Eric Smith | 6-3 | 200 | RHP | - | Spanish Fork, UT | | 1989 | 1991-1992 |
| 6 | Val Snow | 6-1 | 185 | RHP | - | Concord, CA | | 1964 |
| Linc Sorensen | 6-2 | 190 | RHP | - | Salt Lake City, UT | | 1956 |
| Chris Sorensen | 6-4 | 205 | RHP | - | Mesa, AZ | | 1982 |
| 35 | Derek Speigner | 6-1 | 185 | RHP | Junior | Gig Harbor, WA | UC Riverside | 2008-2010 | 2013 |
| 3 | D.J. Stanley | 5-11 | 160 | RHP | Mission | Gilmer, TX | Gilmer High School | 2010 |
| 16 | Jeff Stearman | 6-3 | 175 | RHP | - | Palm Springs, CA | LaQuinta High School | 2001 |