Chasen Shreve has struggled in 2016, and it's because he looks like a completely different pitcher with a new delivery, arsenal, and approach on the mound.
Proclaiming that a pitcher is ‘different' from year-to-year isn't really going out on a limb, but saying that someone is a ‘new' pitcher comes with baggage. A lot goes into who a pitcher is, from their arsenal to their delivery to their velocity, and so on. To say all of those facets of the game have changed (which is what you'd need to see to decide that a pitcher is completely different), is a bold statement.