And trotting out Tanner after losing Game 3 will work out well too?
For starters, I don't think Roark being brought in unexpectedly to relieve is going to work out out well.
Also, most starters tend to suck on short rest. I'd rather have Roark tomorrow than Strasburg anyway.
Gio for game 5 is a downgrade over strasburg.
That chain of events decreases our chances of winning games 3, 4 and 5.