| Steve Martin | Men's Baseball | 6-0 | 190 | OF | - | Provo, UT | | 1966-1967 |
| 11 | Eddy McDaniel | Men's Baseball | 6-4 | 205 | OF | - | Sandy, UT | | 1990 |
| 33 | Mike McKeever | Men's Baseball | 6-4 | 220 | C, OF | - | San Diego, CA | Southwestern College | 2006-2007 |
| Hugh McMillan | Men's Baseball | 6-1 | 150 | OF | - | San Diego, CA | | 1958-1960 |
| Tom McMurtrey | Men's Baseball | 5-11 | 160 | OF, P | - | Houston, TX | | 1979 |
| 5 | Troy McNaughton | Men's Baseball | 6-1 | 195 | OF | - | Tacoma, WA | Curtis High School | 1994-1995 | 1998 |
| 15 | Sean McNaughton | Men's Baseball | 5-9 | 190 | OF | - | Lakewood, WA | Curtis High School | 2005 | 2008-2010 |
| 14 | Jim Mecate | Men's Baseball | 5-10 | 180 | OF | - | Rowland Heights, CA | | 1983-1984 |
| 20 | Tiffany Messerschmidt | Women's Softball | 5-6 | - | OF | - | Thousand Oaks, CA | Thousand Oaks High School | 2009-2012 |
| 1 | Lacey Millett | Women's Softball | 5-6 | - | OF | Sophomore | Folsom, CA | Folsom High School | 2011-2013 |
| 3 | Darren Milne | Men's Baseball | 6-1 | 190 | OF | - | Sandy, UT | | 1990-1992 |
| 2 | Gary Miner | Men's Baseball | 5-8 | 155 | OF | - | Springville, UT | | 1987-1989 |
| 1 | Adrian Molina | Men's Baseball | 6-0 | 180 | INF, OF | - | San Ysidro, CA | Southwestern Community College | 2005-2006 |
| Ralph Morgan | Men's Baseball | | - | OF | - | Provo, UT | | 1955 |
| 15 | Dave Morrow | Men's Baseball | 6-2 | 190 | C, OF | - | Orem, UT | | 1984-1986 |
| 9 | Leon Moyes | Men's Baseball | 6-0 | 175 | OF | - | San Diego, CA | | 1957-1959 |
| Christian Mua | Men's Baseball | 6-0 | 200 | OF | Senior | Chula Vista, CA | Southwestern Community College | 2012-2013 |
| 10 | John Nero | Men's Baseball | 5-10 | 170 | OF | - | Yorba Linda, CA | | 1982 |
| 21 | Kevin Noall | Men's Baseball | 6-3 | 190 | OF | - | Yuba City, CA | Yuba City High School | 2010 |
| Jim O'Brien | Men's Baseball | 5-10 | 165 | OF | - | San Diego, CA | | 1959-1960 |
| 19 | Bill O'Keefe | Men's Baseball | 6-1 | 180 | OF | - | Las Vegas, NV | | 1972-1973 |
| 21 | Spencer Oborn | Men's Baseball | 6-3 | 185 | OF | - | Diamond Bar, CA | Diamond Bar High School | 1997-1998 |
| 20 | Erin Olander | Women's Softball | 5-7 | - | C, OF | - | Yakima, WA | | 2008 |
| 10 | Leif Olson | Men's Baseball | 6-3 | 180 | OF | - | Salt Lake City, UT | | 1981 |
| 18 | Belinda Osborn | Women's Softball | 5-7 | - | OF | - | Payson, UT | | 2001-2004 |
BYU Fan Store 
From the archives: Come Back, Jack
Softball signs transfer Mylee Davis
