you guys are confusing me. what?
If a guy strikes out, but the pitch is wild and gets past the catcher, or the catcher flubs the catch and drops it, the batter can try to run to 1st and get there on an error, provided he reaches before the catcher recovers the ball and makes a throw to the 1st baseman (it's almost kind of like he's stealing 1st, but he can only do it when he's already out at the plate. You can't try it on a wild pitch on a 0-1 count). But because Edwin was already on 1st base at that point, Smoak couldn't run because 1st still "belongs" to Edwin at that point.
I don't entirely get it either because normally you would think that 1st stops being Edwin's and is free'd up by the time he reaches 2nd, but I guess it's not that simple. Baseball is weird like that.
EDIT: Ok, longshot filled in why it was the way it was there. Makes sense. Baseball is still confusing as hell like that though. So many rules that when someone asks "why?" all you can do is shrug and give a mumbly "I dunno."