USMS National Records
|M45-49||50 Back (SCY)||Robert B MacKenzie||05-31-74||30.18|
|50 Free (LCM)||Robert B (Jocko) MacKenzie||07-27-74||28.10|
|50 Back (LCM)||Robert B (Jocko) MacKenzie||08-24-74||35.50|
Please submit all record documentation along with a completed Record Submission Form for all swims that are faster than the current records as of the date of the swim.