Best In The World 2018 was a professional wrestling pay per view event produced by Ring of Honor (ROH). It took place on June 29, 2018 at the UMBC Event Center in Baltimore, Maryland. It was the ninth annual ROH Best in the World event. Wrestlers from New Japan Pro-Wrestling, and Japanese women's promotion World Wonder Ring Stardom with whom ROH has partnerships, also appeared on the card.
Best in the World featured professional wrestling matches that involved wrestlers from pre-existing scripted feuds, plots, and storylines that played out on ROH's primary television program, Ring of Honor Wrestling. Wrestlers portrayed heroes or villains as they followed a series of events that built tension and culminated in a wrestling match or series of matches.
At Final Battle, Dalton Castle defeated Cody to win the ROH World Championship. At Supercard of Honor XII Castle defeated Marty Scurll to retain the ROH World Title. At Masters of the Craft Scurll won a Defy or Deny Match (a fatal 4-way elimination match where if an opponent is eliminated by the champion that person cannot get a title shot until a new champion is crowned but if the champion is eliminated the person that eliminated him will get a future title shot) by last eliminating Castle earning him a future title shot. At Bound By Honor Scurll and Cody won an 8-man tag team elimination match with Cody last eliminating Dalton, however Cody had tagged himself in on Marty's behalf and Marty felt Cody had stolen his victory. During the ROH/NJPW War of the Worlds Tour there was obvious tension between Scurll and Cody. It was then announced via ROH's website that Castle would be defending the ROH World Title against both Cody and Marty.
At Bound By Honor, Punishment Martinez attacked Adam Page. During the ROH/NJPW War of the World Tour Page cost Martinez the IWGP United States Championship and Martinez cost Page the ROH World Television Championship. Page and Martinez were also scheduled to a match during the tour but Page attacked Martinez and the match never became official. At State of the Art: Dallas, Martinez beat Silas Young to win the TV Title. ROH then announced that Martinez will defend the title against Page at Best in the World.
- Numbers in parentheses indicate the length of the match.
- (c) refers to the champion(s) heading into the match.
- Dark Match: The Dawgs (Rhett Titus & Will Ferrara) defeated The Boys (Brandon & Brent)
- Dark Match: Jonathan Gresham defeated Scorpio Sky
- The Kingdom (Matt Taven, TK O'Ryan & Vinny Marseglia) (c) defeated Los Ingobernables de Japon (BUSHI, EVIL & SANADA) (11:00) to retain the ROH World Six-Man Tag Team Championship
- Flip Gordon defeated Bully Ray by DQ (5:32)
- Jenny Rose, Mayu Iwatani, Sumie Sakai & Tenille Dashwood defeated Kelly Klein & Oedo Tai (Hana Kimura, Hazuki & Kagetsu) (10:30) Eight-Man Tag Team Match
- Austin Aries defeated Kenny King (15:40)
- Jay Lethal defeated KUSHIDA (17:37)
- Punishment Martinez (c) defeated Hangman Page (15:30) in a Street Fight to retain the ROH World Television Championship
- The Briscoes (Jay Briscoe & Mark Briscoe) (c) defeated The Young Bucks (Matt Jackson & Nick Jackson) (17:00) to retain the ROH World Tag Team Championship
- Dalton Castle (c) defeated Cody and Marty Scurll (13:45) in a Three-Way Match to retain the ROH World Championship