Introduction
UFC Fight Night 20: Maynard vs. Diaz took place on Monday, January 11, 2010 at the Patriot Center on the campus of George Mason University in Fairfax, Virginia — the first UFC event ever held in the Northern Virginia market. Broadcast live on Spike TV, the card drew 8,078 fans for a gate of $753,962, a near-record for a Fight Night event at the time. The main event was a rematch three years in the making between Gray Maynard and Nate Diaz — a pair who had clashed in the semi-finals of The Ultimate Fighter Season 5, where Diaz had won by guillotine choke. Maynard avenged that unofficial loss with a unanimous decision.
The card featured several notable debuts. Rory MacDonald stepped into the Octagon for the first time at age 19, defeating Mike Guymon by unanimous decision. Evan Dunham and Gerald Harris also made their UFC debuts. Rafael dos Anjos continued his steady UFC climb with a victory over Kyle Bradley.
Quick Stats
📅 Date: Monday, January 11, 2010
📍 Venue: Patriot Center (George Mason University), Fairfax, Virginia, USA
👥 Attendance: 8,078
💰 Gate: $753,962
📺 Broadcast: Spike TV
🏆 Main Event: Gray Maynard vs. Nate Diaz — Lightweight (TUF 5 rematch)
✅ Result: Maynard def. Diaz via Unanimous Decision — R3, 5:00
The Build-Up
The backstory between Gray Maynard and Nate Diaz began on TUF 5 in 2007. They met in the semi-finals in an unofficial bout — Diaz submitted Maynard with a guillotine choke. That result did not appear on either fighter's professional record, but it stoked a genuine rivalry. Maynard had gone unbeaten since, building a 9-0 professional record and positioning himself as the UFC lightweight title contender. He needed a win over Diaz to cement that claim. Diaz, meanwhile, was fresh off his iconic guillotine finish of Melvin Guillard at Fight Night 19 and was building a reputation as one of the most dangerous submission fighters in the 155-pound division.
The Patriot Center at George Mason University had never previously hosted a UFC event. The northern Virginia market — close to Washington DC and home to a significant military and government population — was a natural fit for the UFC's 2010 expansion into new markets. The event sold out and approached $754,000 at the gate.
Main Event: Maynard vs. Diaz
Maynard’s game plan was clear from the opening bell: keep the fight standing, avoid the ground where Diaz's guillotine choke lived, and pressure him with wrestling and volume striking. He executed it across all three rounds. Maynard kept Diaz on the back foot with consistent punching and takedown threats, while keeping his head away from the guillotine range that had ended the TUF bout. All three judges scored the fight for Maynard.
The win moved Maynard to 10-0 and immediately positioned him as the next challenger for BJ Penn’s lightweight title. He would eventually challenge Penn at UFC 125 in January 2011 — drawing by majority decision in one of the most debated bouts in UFC lightweight history.
Rory MacDonald’s UFC Debut
Rory MacDonald was 19 years old when he walked into the Patriot Center to make his UFC debut. Born in Brendan, British Columbia and trained under Georges St-Pierre’s camp in Montreal, MacDonald had an MMA record of 7-1 entering the UFC. He defeated Mike Guymon by unanimous decision in a controlled performance that gave little indication of just how dominant a welterweight he would become. The fight was brief and composed — a 19-year-old carrying himself with the composure of a veteran. MacDonald would go on to challenge for the UFC welterweight championship twice, losing close decisions to GSP and Robbie Lawler in some of the sport’s most memorable fights.
Full Results
Main Card (Spike TV)
Gray Maynard def. Nate Diaz — Unanimous Decision — R3, 5:00 — Lightweight
Evan Dunham def. Eduardo Escudero — Lightweight (Submission of the Night; UFC debut)
Tom Lawlor vs. Aaron Simpson — Majority Draw — Middleweight (Fight of the Night; $30,000 each)
Gerald Harris def. John Salter — KO — Middleweight (Knockout of the Night; UFC debut)
Preliminary Card
Rafael dos Anjos def. Kyle Bradley — Lightweight
Rory MacDonald def. Mike Guymon — Unanimous Decision — Welterweight (UFC debut, age 19)
Nik Lentz vs. Thiago Tavares — Majority Draw — Lightweight (Tavares replaced injured Stephens)
Nick Catone def. Jesse Forbes — Middleweight
Bonuses & Awards
🥇 Fight of the Night: Tom Lawlor vs. Aaron Simpson — $30,000 each (majority draw)
🥇 Knockout of the Night: Gerald Harris — $30,000 (UFC debut KO)
🥇 Submission of the Night: Evan Dunham — $30,000 (UFC debut)
Records & Milestones
• Rory MacDonald’s UFC debut at age 19 — one of the youngest fighters ever to debut in the UFC.
• First UFC event at the Patriot Center, Fairfax, Virginia.
• Two majority draws on one Fight Night card — Lawlor-Simpson and Lentz-Tavares.
• Gray Maynard improved to 10-0, cementing himself as the No.1 lightweight contender for BJ Penn’s belt.
Legacy & Impact
UFC Fight Night 20 is best remembered as the card that closed out the Maynard-Diaz narrative arc that began on TUF 5 and launched Rory MacDonald on one of the most decorated welterweight careers the UFC has seen. The card also showcased the Fight Night series’ role as a launching pad for future stars: MacDonald, Dunham, and Gerald Harris all debuted on a single card in January 2010.
FAQ
What was the TUF 5 connection between Maynard and Diaz?
On The Ultimate Fighter Season 5 in 2007, Gray Maynard and Nate Diaz met in the semi-finals in an unofficial amateur bout. Diaz submitted Maynard with a guillotine choke. The result did not count on professional records but it created a genuine rivalry. Maynard spent the next three years building an unbeaten pro record and pursuing the official rematch, which finally happened at Fight Night 20. He avenged the loss by winning all three judges’ scorecards.
How young was Rory MacDonald at his UFC debut?
MacDonald was 19 years old when he made his UFC debut at Fight Night 20. Born on January 22, 1989, he had turned 19 roughly a year before the fight. His 7-1 record entering the UFC was built largely in regional promotion in western Canada. He had already been training with the GSP camp in Montreal at that age, giving him elite preparation that belied his youth. His controlled, composed performance against Guymon set the tone for a career that would see him become one of the top welterweights in the world by his mid-twenties.
Why did the Fight of the Night go to a bout that ended in a draw?
Tom Lawlor and Aaron Simpson put on one of the most entertaining fights of the evening despite neither man winning. The Fight of the Night bonus rewards competitive entertainment, not results — a draw that produced three rounds of back-and-forth action is precisely the kind of bout the bonus was designed to incentivise. Both men received $30,000. Fight Night 20 was unusual in having two draws on the same card: Lawlor-Simpson and Lentz-Tavares both ended without a winner.
Did Maynard earn a title shot from the Diaz win?
Yes — eventually. Maynard fought once more before his title shot, defeating Nate Diaz’s teammate Kenny Florian at UFC 118 in August 2010. That win cemented his position and he challenged BJ Penn at UFC 125 in January 2011. The result was a majority draw — one of the most hotly contested scoring decisions in UFC lightweight history. He would then fight Edgar for the title again at UFC 136 in October 2011, losing by TKO in the fourth round after coming close to finishing Edgar earlier in the fight.
Was this the first UFC event in the DC/Northern Virginia area?
Yes. The Patriot Center at George Mason University in Fairfax, Virginia had not previously hosted a UFC event. The DC metro area is one of the largest markets in the United States, and its military-heavy population made it a natural target for the UFC’s 2010 venue expansion strategy. The sell-out crowd and strong gate validated the market. The UFC would return to the DC area multiple times in subsequent years, eventually staging events at larger Washington venues.
Where was Rafael dos Anjos in his career at Fight Night 20?
Rafael dos Anjos was steadily building his UFC record at Fight Night 20, having gone 3-3 in his first six UFC appearances. The Bradley win improved his record and kept him active in the lightweight division. He was still years away from the dominant form that would produce his UFC championship run — he won the lightweight title at UFC 185 in March 2015 by finishing Donald Cerrone in 66 seconds. Fight Night 20 was simply another developmental win in a career with a long runway.