Professional career
Grajeda turned professional on May 24, 2008, stopping Juan Pablo Vazquez in the 2nd round. He fought a tough four round battle with Jair Cena ending in an MD win, Grajeda has improved, winning each of his next 4 matches by 1st-round KO. In a Friday Night Fights card Grajeda took a four-round unanimous decision over Osvaldo Rojas.
Professional record
| 18 Wins (14 knockouts), 5 Losses, 2 Draw | |||||||
| Res. | Record | Opponent | Type | Rd., Time | Date | Location | Notes |
| Loss | 18-5-2 |  Terrell Gausha |
UD | 8 | 2015-06-20 | MGM Grand, Grand Garden Arena, Las Vegas, Nevada, US |
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| Loss | 18-4-2 | Austin Trout |
RTD | 7 (10) | 2014-12-11 | Pechanga Resort & Casino, Temecula, California |
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| Win | 18-3-2 |  Charly Soto |
TKO | 3 (?) | 2014-11-15 | Club de Veteranos bamoa Pueblo, Guasave, Sinaloa |
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| Loss | 17-3-2 | Willie Nelson |
UD | 10 | 2014-08-08 | Churchill County Fairgrounds, Fallon, Nevada |
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| Draw | 17-2-2 |  Said El Harrak |
SD | 8 | 2014-05-20 | Santa Monica Pier, Santa Monica, California |
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| Lose | 17-2-1 | Pablo Munguia |
SD | 8 | 2014-02-08 | San Luis Potosi, San Luis Potosí, Mexico |
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| Win | 17-1-1 | Manuel Garcia |
KO | 8(8) | 2013-10-19 | Jose Cuervo Salon, Polanco, Distrito Federal, Mexico |
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| Win | 16-1-1 | Josue Atilano Mendoza |
KO | 1(8) | 2013-09-27 | Jose Cuervo Salon, Polanco, Distrito Federal, Mexico |
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| Win | 15-1-1 | Octavio Castro |
TKO | 7(12) | 2013-05-31 | Centro Historico, Chihuahua, Chihuahua, Mexico |
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| Win | 14-1-1 | Francisco Javier Reza |
UD | 10(10) | 2012-11-16 | Ciudad Parral, Chihuahua, Mexico |
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| Win | 13-1-1 |  Hector Camacho Jr |
KO | 6(1:28) | 2012-07-28 | Parque el Palomar, Chihuahua, Chihuahua, Mexico |
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| Win | 12-1-1 | Alberto Martinez |
KO | ? | 2012-06-09 | Gimnasio Manuel Bernardo Aguirre, Chihuahua, Chihuahua, Mexico |
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| Win | 11-1-1 | Nestor Antonio Figueroa |
KO | 1(1:44) | 2012-03-03 | Gimnasio Municipal, Delicias, Chihuahua, Mexico |
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| Loss | 10-1-1 | Jermell Charlo |
UD | 8(8) | 2010-11-12 | State Farm Arena, Hidalgo, Texas, United States |
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| Draw | 10-0-1 | Alan Sanchez |
PTS | 8(8) | 2010-09-10 | Four Points Sheraton Hotel, San Diego, California, United States |
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| Win | 10-0-0 | Cristian Favela |
UD | 6(6) | 2010-06-11 |  Four Points Sheraton Hotel, San Diego, California, United States |
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| Win | 9-0-0 | Osvaldo Rojas |
UD | 4(4) | 2010-02-26 |  Don Haskins Convention Center, El Paso, Texas, United States |
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| Win | 8-0-0 | Ruben Amezcua |
TKO | 6(8) | 2009-12-12 | Auditorio Miguel Barragan, San Luis Potosí, Mexico |
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| Win | 7-0-0 | Juan Carlos Diaz |
KO | 2(2:48) | 2009-10-10 | Nokia Theater, Los Angeles, California, United States |
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| Win | 6-0-0 | Aaron Martinez |
TKO | 1(0:31) | 2009-04-25 | Arena Miguel Canto Solis, Cozumel, Quintana Roo, Mexico |
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| Win | 5-0-0 | Alejandro Herrera |
KO | 1(4) | 2009-02-21 | Auditorio Benito Juárez, Zapopan, Jalisco, Mexico |
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| Win | 4-0-0 | Gilberto Avila |
TKO | 1(4) | 2009-01-31 | Palenque del FEX, Mexicali, Baja California, Mexico |
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| Win | 3-0-0 | Mario Ramirez |
KO | 1(1:28) | 2008-11-01 | Gimnasio Manuel Bernardo Aguirre, Chihuahua, Chihuahua, Mexico |
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| Win | 2-0-0 | Jair Cena |
MD | 4(4) | 2008-09-20 | Arena Coliseo, Monterrey, Nuevo León, Mexico |
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| Win | 1-0-0 | Juan Pablo Vazquez |
TKO | 2(1:09) | 2008-05-24 | La Feria de Santa Rita, Chihuahua, Chihuahua, Mexico |
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