John Marshall Harlan II,
US Bulk Carriers, Inc. v. Arguelles…
“ A suit simply on the contract to enforce contractual grievances is the normal labor arbitration situation, and 'it cannot be said in the normal situation, that contract grievance procedures are inadequate to protect the interests of an aggrieved employee until the employee has attempted to implement the procedures and found them so.' Maddox, supra, 379 U.S., at 653, 85 S.Ct., at 616. ”
