Edgar is a slight underdog with the betting odds placing him at +145.
The difference for the oddsmakers in comparison to the previously scheduled main event for UFC 153 is quite large however.
Jose Aldo was a 6 to 1 favorite over previous opponent Erik Koch with the incumbent champion coming in at -600 odds, while Koch was the betting underdog at +400.
Frankie Edgar steps into the bout on short notice, but obviously has the credentials to demand much closer odds even against one of the top pound-for-pound champions in the sport in Jose Aldo.
Edgar faces Aldo in the main event of UFC 153 headed to Brazil on Oct 13
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