Chuck Blazer is among four men to have already pleaded guilty in the 2013 U.S. football corruption investigation involving bribes totalling more than $100 million.

Blazer, for nearly two decades the most senior American official at FIFA, was among those whose guilty pleas were unsealed Wednesday by U.S. authorities.

Blazer had pocketed millions of dollars in marketing commissions and avoided paying taxes. He has been a cooperating witness for the FBI since leaving soccer in 2013 and has forfeited almost $2 million.