Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Res. | Record | Opponent | Method | Round | Time | Location |
| --- | --- | --- | --- | --- | --- | --- |
| Loss | 30–14 | Chad Mendes | TKO (punches) | 3 | 0:30 | Milwaukee, Wisconsin , United States |
| Win | 30–13 | Hatsu Hioki | Decision (split) | 3 | 5:00 | Chicago, Illinois , United States |
| Loss | 29–13 | Gray Maynard | Decision (split) | 5 | 5:00 | Atlantic City, New Jersey , United States |
| Loss | 29–12 | Benson Henderson | Decision (unanimous) | 3 | 5:00 | Anaheim, California , United States |
| Win | 29–11 | Anthony Pettis | Decision (unanimous) | 3 | 5:00 | Las Vegas, Nevada , United States |
| Win | 28–11 | Takanori Gomi | Submission (guillotine choke) | 2 | 4:27 | Las Vegas, Nevada , United States |
| Win | 27–11 | Rafael dos Anjos | Submission (jaw injury) | 3 | 1:51 | Oakland, California , United States |
| Win | 26–11 | Shannon Gugerty | Submission (arm triangle choke) | 2 | 3:40 | Broomfield, Colorado , United States |
| Loss | 25–11 | Kenny Florian | Submission (rear naked choke) | 2 | 2:19 | Memphis, Tennessee , United States |
| Loss | 25–10 | Diego Sanchez | Decision (split) | 3 | 5:00 | Las Vegas, Nevada , United States |
| Win | 25–9 | Nate Diaz | Decision (split) | 3 | 5:00 | Las Vegas, Nevada , United States |
| Win | 24–9 | Mac Danzig | Decision (unanimous) | 3 | 5:00 | Omaha, Nebraska , United States |
| Win | 23–9 | Samy Schiavo | TKO (strikes) | 1 | 4:15 | Broomfield, Colorado , United States |
| Loss | 22–9 | Roger Huerta | Submission (rear naked choke) | 3 | 0:51 | Las Vegas, Nevada , United States |
| Win | 22–8 | Marcus Aurélio | Decision (split) | 3 | 5:00 | Las Vegas, Nevada , United States |
| Loss | 21–8 | Tyson Griffin | Decision (split) | 3 | 5:00 | Belfast , Northern Ireland |
| Loss | 21–7 | Din Thomas | Decision (unanimous) | 3 | 5:00 | Hollywood, Florida , United States |
| Win | 21–6 | Justin James | Submission (rear-naked choke) | 2 | 4:42 | Las Vegas, Nevada , United States |
| Win | 20–6 | Joe Martin | Decision (unanimous) | 3 | 5:00 | Lemoore, California , United States |
| Loss | 19–6 | Yusuke Endo | Submission (armbar) | 1 | 2:47 | Tokyo , Japan |
| Loss | 19–5 | Gilbert Melendez | Decision (split) | 5 | 5:00 | San Jose, California , United States |
| Win | 19–4 | Josh Thomson | Decision (unanimous) | 5 | 5:00 | San Jose, California , United States |
| Loss | 18–4 | Tristan Yunker | Submission (rear-naked choke) | 1 | 1:17 | Moline, Illinois , United States |
| Win | 18–3 | Joe Jordan | Decision (unanimous) | 3 | 5:00 | Lakemoor, Illinois , United States |
| Win | 17–3 | Jeff Carsten | TKO (injury) | 1 | 3:01 | Hammond, Indiana , United States |
| Win | 16–3 | Dave Cochran | Submission (rear naked choke) | 1 | 2:26 | Indianapolis, Indiana , United States |
| Win | 15–3 | John Strawn | Submission (choke) | 2 | 3:12 | Island Lake, Illinois , United States |
| Win | 14–3 | Jay Estrada | Submission (rear naked choke) | 1 | 3:42 | Illinois , United States |
| Win | 13–3 | Bart Palaszewski | Decision (unanimous) | 3 | 5:00 | Lakemoor, Illinois , United States |
| Win | 12–3 | Alonzo Martinez | Submission (choke) | 3 | N/A | Des Moines, Iowa , United States |
| Win | 11–3 | Chris Mickle | Decision | 3 | 5:00 | Des Moines, Iowa , United States |
| Win | 10–3 | Alex Carter | Submission | 1 | 2:54 | Illinois , United States |
| Win | 9–3 | Brandon Adamson | Submission (rear naked choke) | 1 | 3:02 | Lakemoor, Illinois , United States |
| Win | 8–3 | Billy Guardiola | Submission (ankle lock) | 1 | N/A | Illinois , United States |
| Win | 7–3 | Dennis Davis | KO | 1 | N/A | Ciudad Juárez , Mexico |
| Win | 6–3 | Vito Woods | Submission (guillotine choke) | 2 | 1:19 | McHenry, Illinois , United States |
| Win | 5–3 | Randy Hauer | TKO | 1 | 2:25 | Medina, Minnesota , United States |
| Win | 4–3 | Billy Guardiola | Submission (ankle lock) | 1 | N/A | Cicero, Illinois , United States |
| Loss | 3–3 | Gabe Lemley | Submission (armbar) | 2 | 0:33 | Fontana, Wisconsin , United States |
| Win | 3–2 | Jed Deno | Submission (choke) | 1 | 3:35 | Rochester, Minnesota , United States |
| Win | 2–2 | Shawn Nolan | N/A | N/A | N/A | Curtiss, Wisconsin , United States |
| Loss | 1–2 | Dan Duke | N/A | N/A | N/A | Curtiss, Wisconsin , United States |
| Win | 1–1 | Adam Bass | Submission (rear naked choke) | 1 | 2:53 | Lake Geneva, Wisconsin , United States |
| Loss | 0–1 | Adam Copenhaver | Submission (rear naked choke) | 1 | N/A | Ottawa, Illinois , United States |
Question:
What was the method used when the opponent was Tyson Griffin?
Answer:
Decision (split)