Bare Knuckle Fighting Championship returns with a blockbuster card with BKFC 66, headlined by Alberto Blas and Ryan Reber for the BKFC bantamweight title.The main event will be a clash of undefeated bareknuckle warriors as Blas (5-0) will put his "O" (and his belt) on the line against Reber (6-0). The entire fight event will feature 11 bare-knuckle fights from the prelims to the main card. View this post on Instagram Instagram PostThe preliminary card will start at 7:00 AM EST, with the main card starting at approximately 7:30 AM EST. The main event walkouts are expected to start at approximately 9:00 AM EST.The co-main event of the evening will feature a lightweight contest between Howard Davis (6-2-1) and James Brown (3-0).Here's the entire main card:Alberto Blas vs Ryan Reber - bantamweight championshipHoward Davis vs James Brown - lightweightAlmat Jumanov vs Rayne Wells - welterweightJustin Ibarrola vs Justin Street - bantamweightArmando Rodriguez vs Dameko Labon - bantamweightJulio Perez vs Devonte Jeffery - cruiserweightJeremy Smith vs Stephen Townsel - cruiserweightAdditionally, former Strikeforce light-heavyweight champion Muhammad 'King Mo' Lawal was supposed to face BKFC middleweight champ David Mundell in this event but had to pull out due to undisclosed reasons.More on BKFC 66: Alberto Blas vs Ryan ReberThe challenger Reber last fought at BKFC 61 back in May, defeating Anthony Foye via a unanimous decision after five rounds. Reber used a very methodical pace and surgically dismantled Foye with his trademark stick-and-move style.As for the champion Blas, he was last seen in action in June at BKFC 62, utterly dominating Keith Richardson en route to a violent first-round stoppage. The heavy-handed southpaw quite literally sent his opponent to another dimension as his punches seemingly put Richardson in an altered state of mind.After getting knocked down a second time, Richardson, who is also a veteran MMA fighter, shot for a single-leg takedown. Despite not having a clear idea where he is or what kind of fight he's in, Richardson somehow beat the 10-count. Shortly after that, however, Alberto Blas landed some hellacious punches that signaled the end of the bout.A harrowing sight followed as a visibly hurt and dazed Richardson tried to fight the referee after the bout was stopped.This should be an interesting bout to watch.