Last year: ERA, WHIP, SO/W, Innings per start.
Vargas - 3.71, 1.273, 3.12, 6.23
Guts - 4.13, 1.303, 2.53, 6.31
Young - 3.65, 1.230, 1.80, 5.69
TBH, I was also thinking Young would be a better option at 4/5, but after looking at the numbers it doesn't seem like it would be a huge difference. Its great to have him for long relief and nights like tonight when we need a spot start.