Three categories of quarterbacks in the NFL:
1. Elite/Very Good (Top 9 or 10 QB's)
2. Average - Won't carry team, but won't lose games
3. Terrible - Will single-handedly lose games consistently and prevent a good team from winning more than they lose
Tyrod is category #2
The only time you get rid of a category #2 is if he is beaten out by a guy already on the roster. Otherwise, you're begging to replace that #2 with a category #3.