| Name | NBC Team | Last MLB Team | Last MLB Year |
|---|---|---|---|
| Marc Rzepczynski | Peninsula Oilers | Toronto Blue Jays | |
| Marc Rzepczynski | Kenai Peninsula Oilers | Cleveland Indians | 2018 |
| Marcus Giles | Barona Stars | San Diego Padres | 2007 |
| Marcus Gwyn | San Luis Obispo Blues | Los Angeles Angels | 2007 |
| Mark Ellis | Topeka KS | St. Louis Cardinals | 2014 |
| Mark Ettles | Wichita, KS | San Diego Padres | 1993 |
| Mark Freeman | Holcomb, MO | Chicago Cubs | 1960 |
| Mark Gardner | Anchorage Bucs | San Francisco Giants | 2001 |
| Mark Grace | North Pole Nicks | Chicago Cubs | 2003 |
| Mark Grace | North Pole Nicks | Arizona Diamondbacks | 2003 |
| Mark Hendrickson | Everett Merchants | Baltimore Orioles | 2011 |
| Mark Huismann | Beatrice Bruins | Pittsburgh Pirates | 1991 |
| Mark Knudson | Beatrice Bruins | Colorado Rockies | 1993 |
| Mark Kotsay | Team USA | San Diego Padres | 2013 |
| Mark Langston | Boulder Collegians | Cleveland Indians | 1999 |
| Mark Lee | Matsu Miners | Baltimore Orioles | 1995 |
| Mark McGwire | Anchorage Glacier Pilots | St. Louis Cardinals | 2001 |
| Mark McGwire | Alaska Glacier Pilots, Anchorage Glacier Pilots | St. Louis Cardinals | 2001 |
| Mark Melancon | Duluth Huskies | Arizona Diamondbacks | |
| Mark Prior | Team USA | Chicago Cubs | 2006 |
| Mark Redman | Anchorage Bucs, Kenai Peninsula Oilers | Colorado Rockies | 2008 |
| Mark Teahen | Nevada, MO | Toronto Blue Jays | 2011 |
| Mark Teixeira | Battle Creek | New York Yankees | 2016 |
| Mark Texeira | MI Battlecats | New York Yankees | 2016 |
| Mark Williamson | Clarinda A’s | Baltimore Orioles | 1994 |
| Marlan Coughtry | Alpine, TX | Cleveland Indians | 1962 |
| Marvin Benard | Matsu Miners | San Francisco Giants | 2003 |
| Mason Tobin | Everett Merchants | Texas Rangers | 2011 |
| Mathew McLain | Santa Barbara Foresters | Cincinnati Reds | |
| Matt Albers | League City, TX | Milwaukee Brewers | 2019 |
| Matt Alexander | Liberal Bee Jays | Pittsburgh Pirates | 1981 |
| Matt Anderson | Team USA | Colorado Rockies | 2005 |
| Matt Batts | Waco, TX | Cincinnati Reds | 1956 |
| Matt Diaz | Santa Barbara Foresters | Miami Marlins | 2013 |
| Matt Garza | San Luis Obispo Blues | Milwaukee Brewers | 2017 |
| Matt Ginter | Anchorage Bucs | Cleveland Indians | 2008 |
| Matt Luke | Liberal Bee Jays | Anaheim Angels | 1999 |
| Matt Palmer | MO | San Diego Padres | 2012 |
| Matt Ruebel | Anchorage Bucs | Tampa Bay Devil Rays | 1998 |
| Matt Young | Matsu Miners | Detroit Tigers | 2012 |