I have just completed my yearly update. Let me know if anything is inaccurate. Bear in mind it does not include JC players.

BYU Cougar Commits that are serving/have served missions:

2006 Class:
Brandon Bradley (CB) - Signed with Louisville out of high school, Served in Sao Paolo, Brazil Mission '04-'05, Redshirted in '06, Played in '07, Played in '08, Played in '09, Played in '10
Rhen Brown (WR/DB) - Greyshirted? in '06, Served in Salta, Argentina Mission '07-'08, Played in '09, Played in '10, Played in '11
Robbie Buckner (CB) - Redshirted in '06, Served in Mozambique Maputo Mission '07-'08, Played in '09, Played in '10, Played in '11
Sam Doman (QB) - Served in Dominican Republic '04-'05, Redshirted '06, Transferred to Oregon
Ian Dulan (DE) - Played in '06, Played in '07, Played in '08, Served in Peoria Illinois Mission '09-'10, Reshirted '11
Ryan Freeman (OL) - Played in '06, Served in Chile Santiago North Mission '07-'08, Played in '09, Played in '10, Played in '11
Romney Fuga (DL) - Played in '06, Served in Madagascar Antananarivo Mission '07-'08, Played in '09, Played in '10 but received medical redshirt once injured, Played in '11
Mike Hague (RB/DB) - Played in '06, Served in Knoxville, Tennessee Mission '07-'08, Played in '09, Played in '10, Played in '11
Braden Hansen (OL) - Redshirted in '06, Served in Philadelphia, Pennsylvania Mission '07-'08, Played in '09, Played in '10, Played in '11
McKay Jacobson (WR) - Played in '06, Served in Sapporo Japan Mission '07-'08, Played in '09, Played in '10, Played in '11
Walter Kahaiali'i (OL) - Redshirted in '06, Played in '07, Served in Australia Melbourne Mission '08-'09, Played in '10, Played in '11
James Lark (QB) - Redshirted in '06, Played in '07, Served in St Petersburg, Russia Mission '08-'09, Played in '10, Played in '11
Mike Muehlmann (TE) - Greyshirted? in '06, Served in San Antonio, Texas Mission '07-'08, Redshirted in '09, Played in '10, Played in '11
Brandon Ogletree (LB) - Greyshirted? in '06, Served in Concepcion, Chile South Mission '07-'08, Played in '09, Played in '10, Played in '11
Jordan Richardson (DL) - Redshirted in '06, Served in Belo Horizonte Brazil Mission '07-'08, Played in '09, Played in '10, Played in '11
Riley Stephenson (P/K) - Gretyshirted? in '06, Served in Aukland, New Zealand Mission '07-'08, Played in '09, Played in '10, Played in '11

2007 Class:
Famika Anae (OL) - Greyshirted? in '07, Served in McAllen Texas Mission '08-'09, Redshirted in '10, Played in '11
Tyler Beck (LB) - Played in '07, Served in Houston Texas Mission '08-'09, redshirted in '10, Played in '11
Braden Brown (TE/OL) - Served in San Juan, Puerto Rico Mission '07, Redshirted in '08, Played in '09, Played in '10, Played in '11
Kaneakua Friel (TE) - Redshirted in '07, Played in '08, Served in Durban South Africa Mission '09-'10, Played in '11
Austen Jorgensen (LB) - Played '07, Served in Tampa Florida Mission '08-'09, Played in '10, Played in '11
Devin Mahina (TE) - Greyshirted? in '07, Served in Antananarivo Madagascar Mission '08-'09, Played in '10, Played in '11
Eathyn Manumaleuna (DT) - Played in '07, Served in Oklahoma City Oklahoma Mission '08-'09, Played in '10, Played in '11
Marcus Mathews (WR) - Greyshirted? in '07, Served in Stockholm Sweden Mission '08-'09, Played in '10, Played in '11
Jason Munns (QB) - Redshirted '07, Served in Oaxaca, Mexico Mission '08-'09, Played in '10, Played in '11
Houston Reynolds (OL) - Served in Hamburg Germany Mission '07-'08, Redshirted in '09 due to injury, Played in '10, Played in '11
Jordan Smith (WR) - Redshirted '07, Served in Boston Massachusetts Mission '08-'09, Played in '10, Played in '11
Manaaki Vaitai (OL) - Played in '07, Served in Las Vegas Nevada Mission '08-'09, Redshirted in '10, Played in '11

2008 Class:
Michael Alisa (LB) - Played in '08, Served in San Juan Puerto Rico West Mission '09-'10, Played in '11
Kevan Bills (LB) - Served in Mendoza, Argentina Mission '09-'10, Redshirted in '11
Cameron Comer (CB) - Redshirted in '08, Served in Richmond Virginia Mission '09-'10, Played in '11
Spencer Hadley (LB) - Played in '08, Served in Roseville California Mission '09-'10, Played in '11
Austin Holt (TE) - Served in St Louis Missouri Mission '08-'09, Played in '10, Played in '11
Solomone Kafu (DL/OL) - Redshirted in '08, Served in New York New York Mission '09-'10, Played in '11
Cody Monsen (LB) - Served in California Santa Rosa Mission '09-'10, Redshirted? in '11
Jake Murphy (WR) - Served in Sydney Australia Mission '08-'09, Transferred to Utah
Iona Pritchard (LB/FB) - Played in '08, Served in Majuro, Marshall Islands Mission '09-'10, Redshirted due to injury in '11
Daniel Sorenson (LB) - Played in '08, Served in San Jose, Costa Rica Mission '09-'10, Played in '11
Justin Sorenson (K) - Played in '08, Served in Macon, Georgia Mission, Played in '11
Brock Stringham (OL) - Redshirted in '08, Served in Tocloban, Phillipines Mission '09-'10, Played in '11
Malosi Te'o (RB) - Signed LOI with UNLV, Served in New York, New York South Mission '07-'08, Redshirted in '09, Transferred to Hawai'i, then back to BYU to play rugby
Michael Yeck (OL) - Served in Birmingham Alabama Mission '08-'09, Redshirted in '10, Played in '11

2009 Class:
Terry Alletto (OL) - Redshirted in '09, Due back in '12
Trevor Bateman (CB) - Redshirted in '09, Due back in '12, Texas Fort Worth Mission
Craig Bills (DB)- Played in '09, Due back in Feb. '12, Ventura California Mission
Tui Crichton (OL) - Redshirted in '09, Due back in '12
Anthony Heimuli (RB/FB) - Played in '09, Due back in ?
Adam Hine (RB) - Served in Panama City, Panama Mission '09-'10, Redshirted in '11
Mitch Mathews (WR) - Redshirted in '09, Due back in '12, Serving in Florida Orlando Mission
Ryan Mulitalo (OL) - Redshirted in '09, Due back in '12
Riley Nelson (QB) - Played in '06 for Utah State, Served in Barcelona, Spain Mission '07-'08, Played in '09, Played in '10 but received medical redshirt, Played in '11
Remington Peck (DE) - Redshirted in '09, due back in '12, New York Rochester Mission
Brett Thompson (WR) - Played in '09, Due back Jan. '12, Louisville, Kentucky Mission
Fono Vakalahi (OL) - Played in '09, Due back in '12
Brad Wilcox (OL) - Served in California San Bernardino Mission '09-11, Due back in '12

2010 Class:
Jordan Black (OL) - Redshirted in '10, Due back in '13
Algernon Brown (RB) - Redshirted in '10, Due back in '13
Jacob Hannemann (S) - Due back in July '12, Little Rock, Arkansas Mission
Toloa'i Ho Ching (LB) - Greyshirted in '10, Due back in '13
Tuni Kanuch (DT) - Due back in '12
Bronson Kaufusi (DE) - Due back in '12, Auckland, New Zealand Mission
Teu Kautai (LB) - Served in San Jose '10, California Mission, transferred to Blinn JC, returned and played in '11
AJ Moore (RB) - Played in '10, Due back in '13
Manu Mulitalo (OL) - Played in '11, Oklahoma Tulsa Mission, Due back in June '14
Joey Owens (LB) - Due back in '12
Graham Rowley (DE) - Played in '10, Played in '11, Due back in '14
Bryan Sampson (TE) - Redshirted in '10, due back in '13
Sae Tautu (LB) - Redshirted in '10, due back in '13
Travis Tuiloma (DT) - Redshirted in '10, Played in '11, Due back in '14

2011 Class:
Corey Edwards (K) - Due back in '13
Austin Heder (FB/LB) - Played in '11, Due back in '14, Canada Montreal Mission
Coleby Jorgensen (TE) - Redshirted in '11, Due back in '14, Calgary Canada Mission
Corbin Kaufusi (DE) - Due back in '13
Alex Kuresa (QB) - Redshirted in '11, Due back in '14
Lene Lesatele (LB) - Redshirted in '11, Due back in '14
Aulelio Olomua (LB) - Due back in '13
Baker Pritchard (DE) - Redshirted in '11, Due back in '14 Serving in Hawaii Honolulu Mission
Adam Pulsipher (LB) - Due back in '13
Brian Rawlinson (OL) - Due back in '13
Stehley Reden (TE) - Redshirted in '11, Due back in '14
Matt Sumsion (TE) - Due back in '13
Kesni Tausinga (DL) - Due back in '13

2012 Class:
Phillip Amone (LB) - Due back in '14
Micah Hanneman (DB) - Due back in '14
Troy Hinds (LB/DE) - Due back in '14
Tanner Mangum (QB) - Due back in '14
Steven Richards (DL) - Due back in '14
Josh Weeks (WR) - Due back in '14

**This list does not include JC transfers that have served missions unless they leave after committing. Walk-on players are generally not included. It will be updated when mission plans are announced for any of the members of these classes. Please let me know if there are any mistakes or omissions, or if you have learned of a player leaving on a mission.**