Garza was an eighth round draft pick of the Seattle Seahawks in 1987. After his release, he went to training camp with PIttsburgh in 1988 and was released. Garza signed with Winnipeg in October of 1988 and remained with the Bombers until partway through the 1995 season. Garza was mainly backup, seeing limited action until 1995 when he had 172 pass attempts after 5 games then was traded to Ottawa.
| Year | Team | GP | PA | PC | % | Yds | TD | Int | Sacked | Yds |
|---|---|---|---|---|---|---|---|---|---|---|
| 1989 | WPG | 5 | 10 | 1 | 10 | 20 | 0 | 2 | ||
| 1990 | WPG | 8 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| 1991 | WPG | 18 | 20 | 10 | 50 | 192 | 2 | 2 | ||
| 1992 | WPG | 18 | 93 | 39 | 41.9 | 580 | 6 | 3 | ||
| 1993 | WPG | 13 | 97 | 55 | 56.7 | 829 | 6 | 3 | ||
| 1994 | WPG | 8 | 47 | 25 | 53.2 | 373 | 2 | 1 | ||
| 1995 | OTT | 13 | 239 | 132 | 55.2 | 1786 | 10 | 8 | ||
| 1995 | WPG | 5 | 172 | 92 | 53.5 | 1168 | 3 | 9 |
| Year | Team | TC | Yds | Avg | TD | Long |
|---|---|---|---|---|---|---|
| 1989 | WPG | 0 | 0 | 0 | 0 | 0 |
| 1990 | WPG | 0 | 0 | 0 | 0 | 0 |
| 1991 | WPG | 3 | 14 | 4.7 | 0 | 8 |
| 1992 | WPG | 11 | 46 | 4.2 | 0 | 12 |
| 1993 | WPG | 4 | 25 | 6.3 | 0 | 12 |
| 1994 | WPG | 1 | 18 | 18 | 0 | 18 |
| 1995 | OTT | 11 | 48 | 4.4 | 2 | 18 |
| 1995 | WPG | 13 | 22 | 1.7 | 2 | 3 |
| Year | Team | F | FL |
|---|---|---|---|
| 1989 | WPG | 0 | 0 |
| 1990 | WPG | 0 | 0 |
| 1991 | WPG | 1 | 0 |
| 1992 | WPG | 0 | 0 |
| 1993 | WPG | 1 | 0 |
| 1994 | WPG | 1 | 1 |
| 1995 | OTT | 2 | 2 |
| 1995 | WPG | 6 | 4 |
| Year | Team | T | ST | Total |
|---|---|---|---|---|
| 1989 | WPG | 0 | 0 | |
| 1990 | WPG | 0 | 0 | 0 |
| 1991 | WPG | 0 | 0 | 0 |
| 1992 | WPG | 0 | 0 | 0 |
| 1993 | WPG | 0 | 0 | 0 |
| 1994 | WPG | 1 | 0 | 1 |
| 1995 | OTT | 0 | 0 | 0 |
| 1995 | WPG | 0 | 0 | 0 |