Dr. Ratsjenko was an unscrupulous doctor with a likening for bizarre experiments on live specimen. Having trouble finding volunteers, he made a deal with the Sewer Suckers: as long as he would provide the team with the occasional mutation, he was free to experiment on his fellow team-mates.
The Doctor made quite an impressive start (and ending) of his BB-career. In his first action ever for the team, he managed to obtain a niggling injury. Luckily, there was an apothecary to mend things. Unluckely however, the apo wasn't around anymore when Ratsjenko got killed by a foul later on in the game. The fans though were highly impressed by this performance and awarded him posthumously with the MVP with a special annotation for the brutal and agonising way in which he had died.
His team mates didn't seem too upset with his dead.