Pineda missed an entire season and understandably started slow but as was pointed out has been a different pitcher since the beginning of May. Major league pitchers on average in 2018 had quality starts in 79 of 162 games which is just below 50%. So far this year AL pitchers average 29 quality starts in 77 games which is way below 50% and the average ERA is 4.52. Pineda in his last 7 games had 5 quality starts and missed out on 7 of 7 by just an inning and a third. That is as the 5th starter!...I can understand saying you have to include even the bad innings in a performance but why would you dismiss the latest 7 starts. 1 of his first 7 starts were quality and 5 of his last 7 were quality. That still averages out to better than replacement but hardly tells the whole story which is that in the last month and a half he has been much better than the average major league starter. Better than the average major league starter is more than all right for a #5.
Well it's not all right if a team has more than one #5 though. Perez definitely looks more like #5, Gibson sometimes looks like #5. Now there is a problem here for a contending team.