Jonathan Brown signed as a free agent out of Tennessee with the Toronto Argonauts in May of 2004 and would go on to play six seasons for the Argos. Brown won four consecutive East All-Stars at defensive end from 2005 to 2008 as well as CFL All-Stars in 2005 and 2007. Brown was named the Most Outstanding Player in the East in 2007 and runner-up for the CFL award. Brown recorded 51 career quarterback sacks, with a career high of 13.in 2005 and matched in 2007.
| Year | Team | GP | T | ST | Total | TFL | Yds | KD | Sacks | Yds |
|---|---|---|---|---|---|---|---|---|---|---|
| 2004 | TOR | 18 | 39 | 0 | 39 | 0 | 0 | 0 | 8 | 56 |
| 2005 | TOR | 18 | 36 | 0 | 36 | 5 | 8 | 1 | 13 | 89 |
| 2006 | TOR | 18 | 35 | 0 | 35 | 3 | 15 | 1 | 6 | 29 |
| 2007 | TOR | 18 | 47 | 2 | 49 | 4 | 8 | 0 | 13 | 94 |
| 2008 | TOR | 18 | 44 | 0 | 44 | 2 | 5 | 6 | 7 | 34 |
| 2009 | TOR | 9 | 13 | 0 | 13 | 2 | 5 | 1 | 4 | 18 |
| Year | Team | Int | Yds | Avg | TDInt | Long | FR | Yds | Avg | TD | Long | FF |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2004 | TOR | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 1 |
| 2005 | TOR | 0 | 0 | 0 | 0 | 0 | 3 | 32 | 10.7 | 1 | 18 | 1 |
| 2006 | TOR | 1 | 29 | 29 | 0 | 29 | 1 | 0 | 0 | 0 | 0 | 0 |
| 2007 | TOR | 0 | 0 | 0 | 0 | 0 | 1 | 5 | 5 | 0 | 5 | 0 |
| 2008 | TOR | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 2009 | TOR | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
