| Full name: | James Brown Cowperthwait |
| Born: | 1862, Massachussets, United States of America |
| Died: | 30th March 1887, Philadelphia, Pennsylvania, United States of America |
| Relations: | Brother: CT Cowperthwait |
| Teams: | Chestnut Hill (Halifax Cup: 1880-1881); Philadelphia Cricket Club (Halifax Cup: 1882); University of Pennsylvania (Miscellaneous: 1879-1882); All teams |
| Lists of matches and more detailed statistics | |