Starter
Marcus Stroman: C+
Looks like many teams (especially teams in the AL EAST) are now figuring out how to hit Stroman's pitches. And he is missing his spot too.. It is really concerning because Stroman is short guy. It is easier to hit a pitches thrown by short pitcher He is trying to pitch lower consistently, but sometimes he pitches too low. He is getting hit hard in May as well.. His Opponents batting average was 0.208 in April, but it is 0.289 in May.
He need to find his spot, and trying to approach every batters differently every time.
Marco Estrada: A
Some people may say last year was a fluke year for him, but it looks like it is not. Many stats are proving that as well. His WAR (Wins Above Replacement) was 1.8 last year, but right now (about 1/3 of the season), it is already 1.3. He ranks 4th in opponents batting average (0.207), Clayton Kershaw, Drew Pomeranz, Jake Arrieta are the only three guys with lower OBA than Estrada. His fastball averages only 88mph, but it is hard to hit due to it's vertical movement. Among qualified pitchers, he has the best vertical movement with 13.1 inches.. Better than Kershaw (12.4). I know there are still many games to go, but I'm hoping he can pitch consistent and batters can give him a run support
JA Happ: A-
He became a completely different pitcher from 2014. He recorded quality start in every game this year except one game against the Rays when he got hit hard. His fastball velocity is down compared to 2014, but he started to use more slider and less curveball. The good record shows it is working well for him. I can also see that he is trying to locate his pitches in the lower part of the strike zone as well.
Aaron Sanchez: B
He is definitely better than his first stint as a starter. His velocity is better, and he can better locate his pitches. The only thing he need to improve is his third pitch. His fastball has great sinking movement, and his curve is getting better. However, it is not enough to get through those batters with only two pitches. He need to develop his changeup which will eventually become his third pitch. It will be better if he can throw one like King Felix or Greinke.
RA Dickey: D
In April, I could give him F because he was horrible. Looks like he is getting better as season goes on. However, I think his performance need to be more consistent
Roberto Osuna: A
He is becoming one of the most masterful closers in the league. I don't know if he will convert to the starter or stick to the closer, but I like what he is doing right now.
Drew Storen: D-
His performance is definitely below parity. Last year, he was good as a closer, but when Papelbon stole his role in the Nats, he went rocky. Unfortunately, that rocky performance is still going on with the Jays. I don't think he can be a set-up or 7th inning guy unless he can prove everyone that he can be better.
Jesse Chavez: B-
When the Jays traded Liam Hendriks for him, many fans thought we got ripped.. However, looks like he is doing what Hendriks did last year. (Hendriks is doing terrible in the A's) He just need to be consistent and be able to induce some groundballs.
Joe Biagini: A
Looks like he can end up as the best rule 5 draftee in 2015. (With Joey Rickard in the Orioles is declining significantly) Didn't expect him to be this good. I can see he is consistently pounding lower part of the strike zone with mid 90 fastball and great curveball. If he can continue his performance, he can be one of the best one in the league.
Gavin Floyd: B
He is doing alright