Even though I feel Escobar is overrated by some, he's the best 5x5 guy in this group. Those K numbers have to get him a bit more value.
I would rate Thomson second. He really came on last season and looks like one of those guys who has benefitted tremendously from Mazzone. I'm a little concerned about his walk rate this season, but he's found a way to strand most of them, and should be fine.
Webb is a decent commodity, and is a very solid back of the fantasy rotation type.
I will take the stance against Livan Hernandez. A lot of mileage on that arm, and he's thrown a ton of pitches the last two years. What's troubling to me is that his peripheral numbers are very poor thus far this season, and this is in indication of bad things possibly on the horizon.