Sleeper:
Julian Merryweather: this is the year we finally see the guy stay on the field and get a first hand look at the stuff. Reports last year had his fastball up to 100 MPH, so far in spring he's been reported to be sitting mid-upper 90's in limited action. He might be able to be a nice mid-season bullpen addition after the Jays finally move on from the silly notion of stretching him out as a starter
Dasan Brown: the guy had a decent debut in rookie ball putting up a 148 WRC+. He is a player with tools for days, but is super raw at this point. With potentially 80 grade speed if the bat is even average this guy could still be a star.
Bust:
Joey Murray: Trick pitch guys always leave me skeptical at best. Murray may have two good pitches with his "invisiball" and a decent curveball, but ultra-low velocity guys like this have a very small margin for error with regards to pitch location. His ultimate test will be in AAA if the Jays are able to find room for him in the rotation there, there is a huge logjam of deserving starters that need innings, Murray is just one of many. I have suspicions he is going to end up exposed in AAA and homeruns are going to be an issue. Hopefully he can prove me wrong.
New Legit Guy:
Riley Adams: The bat looks to be legit with him beginning to unlock his power potential. Reports about his defense are generally positive as well, including a very high caught stealing percentage. If he keeps the strikeouts under control he has potential to be a good MLB starting catcher very soon.