I have no doubt that's why he did it (plus, you can factor in Viz's clutch base-hitting the last couple of years)... Personally (as you can read earlier in the thread), I would have moved Ensberg to 3rd after he pinch-hit, thus you wouldn't have wasted him for just one AB. Then, you could have pinch-hit whomever in Lamb's spot in the bottom of the 8th (I was only thinking this because Lamb was having a horrible night, both at the plate, and in the field... thus, I was pretty sure Jimy was thinking that tonight just wasn't his night, and he was going to pinch-hit for him anyways). Hopefully, Morgan will be in the lineup tonight against the righty Trachsel.... then Lamb will probably get the start on Saturday, since he's seen plenty of Baldwin in the AL, and then Ensberg probably again on Sunday.
If you don't get the lead in the 8th, though, you might want to send Lidge back out there to at least start the 9th.