Grudge Training Center

{{short description|Mixed martial arts training organization in Colorado}}

{{MMA Training Associations

| teamname = Grudge Training Center

| image =

| imagesize =

| dateestablished = 2009 (start)
2016 (defunct)

| founder = Trevor Wittman

| trainers = Trevor Wittman, Jake Ramos, Luke Caudillo

| schoollocations = Arvada, Colorado

| website = http://grudgetrainingcenter.com

}}

Grudge Training Center (GTC) was a mixed martial arts training center founded by coach Trevor Wittman in 2009. Originally located in Wheat Ridge, Colorado, GTC relocated to Arvada, Colorado in 2013. The gym was an affiliate of Jackson's Submission Fighting.{{Cite web |url=http://www.purefight.org/coverage/236303-Northern-Colorado/video/281136-Grudge-Training-Center-Tour |title=Grudge Training Center Tour | Northern Colorado | Purefight |access-date=2010-08-11 |archive-url=https://web.archive.org/web/20110727192415/http://www.purefight.org/coverage/236303-Northern-Colorado/video/281136-Grudge-Training-Center-Tour |archive-date=2011-07-27 |url-status=dead }} Wittman closed Grudge in November 2016.{{cite AV media |last1=Garcia |first1=Raphael |last2=Humes |first2=Schwan |date=5 May 2017 |title=MMA Ratings Podcast: 5.4.2017 |language= |url=https://www.youtube.com/watch?v=iEtYvCUKluU&t=24m28s |archive-url=https://ghostarchive.org/varchive/youtube/20211215/iEtYvCUKluU |archive-date=2021-12-15 |url-status=live|series=MMA Ratings Podcast |access-date=5 May 2017 |medium=Podcast |time=24:28}}{{cbignore}}