Given the last couple years, how can you 100% say Lutz is still that guy?
Lutz was once as unproven as Grupe. Now, he's looking at stiff competition. I don't think that is an accident which really means the coaches see a way to improve.
We'll know their decision soon and can second guess it for years after that.
The thing I take in consideration with Grupe is his exceptionally small frame. If he takes a hard hit tackling, getting tackled, or getting blocked, what are the chances he gets injured?
To me, the decision comes down to weighing the odds that Lutz misses more kicks than Grupe vs the odds that Grupe gets injured taking a hard hit at some point during the season.