This was the outlook in 2005; however, current philosophy is the worst thing you can do is let a juicy fastball go by.
I dont need to regurgitate everything I said above but there are very good reasons for why the mindset and approach has changed.
If you never swing at a ball, you are waiting for the ball to get too deep. Kind of like how if you never get bluff'd out you are calling too often.
At some point, you have to commit to what you see and what you guess. You have to turn on a fastball and meet it in front. If that fastball is a well timed and well "tunneled" slider , and you k, you gotta live with it.
If Casas is going up there afraid to swing at a ball, then hes not going to the plate with an aggressive mindset. He should be going up there and looking to eat. Have you ever taken a changeup middle-middle, its a much worse feeling then chasing a slider. Thats going to happen.
Like I said above, when Im hot, Im looking to swing....When my confidence is off, Im looking to walk. Be selective, but swing at the pitch that you think is going to be the best pitch of the at-bat. A walk is not something , especially someone like Casas, should be looking to do. Okay if you are a 7,8,9 hitter or a speedster.