Then, in March 2011, it was revealed that Peter would travel to Germany to face undefeated Finnish prospect Robert Helenius. Peter was rumoured to be in training with Jeff Mayweather, however, Mayweather was not present for Peter's fight against Helenius. Peter weighed in for the contest at , 18.5 lbs heavier than in the Klitschko fight. Peter was without a reputed trainer or even a cutman for the fight. Peter had reasonable success in the first half of the bout, winning several of the first six rounds; however, after that point Peter began to tire. The end came when Helenius knocked down an exhausted Peter in round nine, Peter got to his feet only to be sent back to the canvas where he remained for well over the 10 second count, awarding Helenius the win by KO. The nature of the loss to Helenius, as well as Peter's terrible physical condition led many to call for Peter's retirement from boxing. 2014 return Peter made an unexpected return to the ring on September 27, 2014 to face journeyman Ron Aubrey. Peter came into the ring at an all-time career heavy of , and was struggling to walk before the bout began. Peter ended the fight when a vicious right hook knocked Aubrey unconscious in the first round. Fight cancellations During his four-year period of near total inactivity, Peter had been signed to fight several opponents with all the bouts being cancelled. He was scheduled to compete in the Super 8 boxing tournament, but pulled out due to injury. He was then scheduled to face former title challenger Alex Leapai but once again he pulled out as the fight neared. He then signed to fight Alexander Ustinov but again cancelled the fight with only days to go. Peter was close to agreeing to fight Luis Ortiz before eventually being replaced. Career from 2016–present At the age of 36, after a two-year layoff, Peter returned to the ring on October 23 fighting in Mexico, defeating unknown boxer Juan Carlos Salas (6–9) in three rounds. Peter weighed 262-pounds. It was still unclear if Peter would be returning to boxing full-time. On November 1, there were early talks that Peter would be fighting former world title challenger Kubrat Pulev in December in Sofia, Bulgaria. Pulev, ranked at number 2 with the IBF, recently defeated Derek Chisora via decision in May. A fight was confirmed five