| McGregor, Roy | | | DELKOTE | Chief Engineer |
| McGregor, Roy; 1932 Red Book; 1932 | 1932 Red Book | 1932-00-00 | MICHIGAN | Captain |
| McGregor, Roy; 1933 Red Book; 1933 | 1933 Red Book | 1933-00-00 | MICHIGAN | Captain |
| McGregor, Roy; 1934 Red Book; 1934 | 1934 Red Book | 1934-00-00 | MICHIGAN | Captain |
| McGregor, Roy; 1935 Red Book; 1935 | 1935 Red Book | 1935-00-00 | MICHIGAN | Captain |
| McGregor, Roy; 1940 Red Book; 1940 | 1940 Red Book | 1940-00-00 | MICHIGAN | Captain |
| McGregor, Roy; 1941 Red Book; 1941 | 1941 Red Book | 1941-00-00 | MICHIGAN | Captain |
| McGregor, Roy; 1942 Red Book; 1942 | 1942 Red Book | 1942-00-00 | MICHIGAN | Captain |
| McGregor, Roy; 1943 Red Book; 1943 | 1943 Red Book | 1943-00-00 | MICHIGAN | Captain |
| McGregor, Roy; 1966 Red Book; 1965 | 1966 Red Book | 1965-00-00 | DELKOTE | Chief Engineer |
| McGregor, Roy; 1967 Red Book; 1967 | 1967 Red Book | 1967-00-00 | DELKOTE | Chief Engineer |