A couple of years ago, I'd have agreed with you GW, but B Welke went on a major over binge last year (18-11 OU overall with a big streak in there at some point as i recall; and of course i realize that OU numbers aren't the entire story but i watched a handful of his games and noticed his zone seemed smaller). The technology that MLB uses analyzes these guys 100 different ways and provides constant feedback about their strike zone, so they're constantly reacting and considering constructive criticism. Maybe the pendulum swings back this year on Bill Welke, i dunno, but at least based upon my watching of his games last season, he definitely seemed to have a tighter zone in 2015 than in prior years.
All that said, I've been coming to these threads long enough to know better than to think that i'll change your mind (you understandably need to see it with your own two eyes), but that's my thought process, flawed though it may be.
As for rain in Cleveland, I'm about 10 miles west of downtown right now, and weather here moves west-to-east 90+% of the time (and is right now). Rain stopped about two hours ago, and while the skies are cloudy, things are looking promising for the game to start on time and without a delay. So, you're looking good until at least the second inning!