| Sornpichai Kratingdaenggym | |
| Birth Name: | Nikhom Chuboon |
| Other Names: | Matjurat mueang nuea (มัจจุราชเมืองเหนือ) "Northern Death" Flyweight Hope |
| Nationality: | Thai |
| Birth Date: | May 1, 1974 |
| Birth Place: | Lampang, Thailand |
| Fighting Out Of: | Bangkok, Thailand |
| Height: | 1.60 m |
| Weight: | 51kg |
| Weight Class: | Flyweight Super-flyweight |
| Stance: | Southpaw |
| Box Win: | 30 |
| Box Kowin: | 19 |
| Box Loss: | 4 |
| Box Draw: | 1 |
| Box Nc: | 0 |
| Boxrec: | 6539 |
Nikhom Chuboon, also known as Sornpichai Kratingdaenggym (Thai: ศรพิชัย กระทิงแดงยิม) or Sornpichai Pitsanurachan (Thai: ศรพิชัย พิษณุราชันย์), is a Thai former professional boxer who competed from 1995 to 2001 and held the WBA flyweight title from 1999 to 2000.
Born in Lampang and raised in Kamphaeng Phet in northern Thailand. He started his combat sports career with Muay Thai before moving on to professional boxing.
In early 1996, he won the WBU flyweight title came in a twelve-round win over Angel Almena in Chiang Rai. He defended the title five times before being stripped in 1997. In the first defense he traveled to Italy to face the Luigi Castiglione at Town Square, San Mango d'Aquino, on 8 August 1996. Sornpichai won via unanimous decision. He also defeated Daniel Ward in Loei the same year.
In 1998, he moved up in weight to the super flyweight division and won the PABA title. He defended it four times before returning to flyweight.
On September 3, 1999 he challenged for the WBA flyweight title against reigning champion Leo Gámez in Mukdahan. Sornpichai defeated Gámez via eighth-round knockout to capture the WBA title, making him the fourth Thai WBA flyweight world champion after Pone Kingpetch, Chartchai Chionoi, and Saen Sor Ploenchit.
He lost the title in his second defense against Eric Morel at the Alliant Energy Center, Madison, Wisconsin on 5 August 2000.
Sornpichai retired after losing ninth-round knockout to a Japanese Jun Toriumi in early 2004 at Korakuen Hall, Tokyo, Japan. He then traveled as a trainer to certain countries such as China and Vietnam, but then returned to Thailand because of eye injuries. This was a result of his boxing since he was just 10 years old.
He currently lives with his only daughter born to an ex-wife who left him.[1]
|- style="background:#fbb;"| 1995-06-10|| Loss ||align=left|
Dao-Udon Sor.Suchart || || Lampang, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;"| 1995-05-06|| Win||align=left| Sakpaitoon Decharat || Silapa Muay Thai Nai Khanom Tom, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;"| 1995-02-13|| Win||align=left| Prakayfai Kor.Bangkruai || Rajadamnern Stadium || Bangkok, Thailand || KO|| 2 ||
|- style="background:#cfc;"| 1994-12-18|| Win||align=left| Narongnoi Kiatsarika || Rajadamnern Stadium || Bangkok, Thailand || KO (Left hook)|| 3 ||
|- style="background:#cfc;"| 1994-12-01|| Win||align=left| Singngern Lurkangsi || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|-| colspan=9 | Legend: