Umm I dunno if anyone else realizes this but . . . If you take away the 3 games he pitched against the Awful Cubs (3 games, 26 innings pitched, 0 ER) Capuanos ERA would be 4.57. So really Capuano hasn't been all that great, he just dominated a terrible team 3 times to make his ERA look good.
If you take out the last three starts, his era would be 3.07. So yeah, that's great, but we can't take away any stats. Hence his era is in between the two.