#2 First time this year that the main event has been a singles match and Roman Reigns wasn't in it
Roman Reigns' match against Bobby Lashley was expected to main event Extreme Rules since Reigns has main evented a large number of pay-per-views over the past year. Aside from Fastlane which was a SmackDown exclusive pay-per-view, Reigns has main evented every pay-per-view that didn't have a multi-man match as their main event.
In fact, you have to go all the way back to No Mercy back in 2017 to find a pay-per-view that Roman Reigns was part of, but it was main-evented by a singles match but it didn't include the former World Champion.
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Edited by Amar Anand