While he's drifting as low as -600 (to Siver's +400) over on SportsInteraction.com. Those are the shortest odds on Conor McGregor over Dennis Siver, by a fair distance. McGregor opened at a smiliar number for 5Dimes, but has already shot to -1000. Numbers from Bovada and SportsBet aren't much lower. McGregor is even riding at -462 to finish inside the distance. Long story short, gamblers appear to be looking at this matchmaking as nothing short of a squash match.
McGregor will enter his headlining bout against Siver on a four year, twelve fight unbeaten streak. Currently, he's riding back to back first round knockouts over Diego Brandao And Dustin Poirier. Siver, on the other hand, is recently returned from a nine month suspension for performance enhancing drugs, following his win over Manvel Gamburyan (later turned to no contest). He'll enter his bout against McGregor off a hard fought decision over UFC newcomer Charles Rosa at Fight Night: Nelson vs. Story. Siver's last stoppage win was a rear naked choke submission over Andre Winner in 2010.
It's tough to argue with the incredibly long odds against Siver here. His gameplan has slowly gone from scrappy, powerful kickboxer to ground-n-pound, top control fighter. And while he still enacts that game reasonably well against the right kind of opponent, they tend to be the kind of fighters who are very prone to being physically overwhelmed. Considering he's not a huge KO or submission threat, it's hard to see an easy way forward for him to get a win against McGregor. I wouldn't be surprised if the odds move wider than they are already.