Massachusetts Pension Reserves Investment Management Board, Boston, issued RFPs for a manager to run $300 million in distressed debt, a new allocation for the $27 billion system. The move is the result of an asset allocation study conducted earlier this year. Proposals, which should be sent by mail to Wayne Smith, senior investment officer, alternative investments, at the fund, are due by 3 p.m. EDT Sept. 16. Finalists will be chosen Oct. 7, and a selection will be made Jan. 5. Consultant Pathway Capital Management is assisting.