Former undisputed heavyweight champion Mike Tyson is receiving offers left and right, after revealing that he's seriously considering the possibility of returning to the ring to take part in exhibition bouts to raise money for charity.

Tyson, who is actively working out and currently in top form, released a training clip last week that went viral on the internet.

The 53-year-old Hall of Famer has been away from the ring since 2005, when he retired on the back of a knockout loss to Kevin McBride.

Earlier this week, Tyson received a seven figure offer to take part in an exhibition fight in Australia, against one of several rugby players to turn boxers - like Sonny Bill Williams and Paul Gallen.

But now David Feldman, President of Bare Knuckle Fighting Championship [BKFC], has presented a $20 million guarantee to secure Tyson for his organization.

The offer would give Tyson the ability to choose his opponent, as long as that fighter is under contract with BKFC.

Even if Tyson takes a pass on fighting in a Bare Knuckle format, Feldman is open to working with Tyson in any way possible.

“While we did make a guaranteed offer of $20 million for Mike [Tyson] to fight for BKFC, we’re open to many different options as to how we can work together. Obviously, the excitement of seeing Mike’s video showing himself training and desire to participate in exhibitions inspired us to reach out and make the offer.” Feldman said to heavy.com.

Feldman's company has showcased former champions like Paulie Malignaggi and Ishe Smith in bare knuckle fights. And they recently signed up former heavyweight champion Shannon Briggs, who vows to make his bare knuckle debut once the coronavirus pandemic dies down.