Clarkson was a first round draft of the BC Lions in 1987. BC released Clarkson in September of 1991., Clarkson was signed by Calgary that same month, did not play any games for the Stampeders.
| Year | Team | GP | T | ST | Total |
|---|---|---|---|---|---|
| 1988 | BC | 10 | 0 | 0 | 0 |
| 1989 | BC | 5 | 0 | 0 | 0 |
| 1990 | BC | 18 | 2 | 0 | 2 |
| 1991 | BC | 8 | 0 | 0 | 0 |