Mandarich was a first round draft pick of Edmonton in the 1984 CFL college draft. Mandarich played six years with Edmonton from 1984 to 1989. Mandarich signed as a free agent with Ottawa in 1990.
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| Year | Team | GP | T | ST | Total | TFL | Yds | KD | Sacks | Yds |
|---|---|---|---|---|---|---|---|---|---|---|
| 1984 | EDM | 15 | 1 | |||||||
| 1985 | EDM | 16 | 3 | |||||||
| 1986 | EDM | 17 | 6 | |||||||
| 1987 | EDM | 12 | 13 | 1 | ||||||
| 1988 | EDM | 2 | 0 | 2 | ||||||
| 1989 | EDM | 18 | 19 | 1 | ||||||
| 1990 | OTT | 13 | 18 | 2 |
Tackles were not tracked until 1987.
| Year | Team | FR | Yds | Avg | TD | Long | OFR | FF |
|---|---|---|---|---|---|---|---|---|
| 1984 | EDM | 2 | 0 | 0 | 0 | 0 | 0 | |
| 1985 | EDM | 0 | 0 | 0 | 0 | 0 | 0 | |
| 1986 | EDM | 2 | 1 | 0.5 | 0 | 1 | 0 | |
| 1987 | EDM | 0 | 0 | 0 | 0 | 0 | 0 | |
| 1988 | EDM | 0 | 0 | 0 | 0 | 0 | 0 | |
| 1989 | EDM | 1 | 0 | 0 | 0 | 0 | 0 | |
| 1990 | OTT | 1 | 0 | 0 | 0 | 0 | 0 |
| Year | Team | KOR | Yds | Avg | TD | Long |
|---|---|---|---|---|---|---|
| 1984 | EDM | 0 | 0 | 0 | 0 | 0 |
| 1985 | EDM | 2 | 3 | 1.5 | 0 | 3 |
| 1986 | EDM | 0 | 0 | 0 | 0 | 0 |
| 1987 | EDM | 0 | 0 | 0 | 0 | 0 |
| 1988 | EDM | 0 | 0 | 0 | 0 | 0 |
| 1989 | EDM | 0 | 0 | 0 | 0 | 0 |
| 1990 | OTT | 0 | 0 | 0 | 0 | 0 |
