You don't have to be a great pitcher to accomplish what Rick Porcello did last night, but it doesn't hurt. In case you missed it, Porcello quickly navigated his way through the Orioles' lineup over nine innings, allowing just four hits and two runs and needing only 89 pitches to do so.
Since 2010, a nine-inning complete game in 90 pitches or fewer has only been done 13 other times. Porcello is the only pitcher to do it this year, and only Jeff Samardzija accomplished it in 2015.
It's not all that surprising that such a thing would happen against an offense like the Orioles. The O's have an above-average offense, but it relies primarily on power and not so much on patience and on-base percentage. The Orioles rank second in the American League in slugging percentage, but they're just 10th in on-base percentage. O's batters also collectively rank third in O-Swing% (swinging at pitches outside the strikezone). Again, that's not stunning for a team that employs Adam Jones and Jonathan Schoop. They're fine hitters, but they are not overly concerned with working the count.
Overall, the O's rank sixth in the AL in runs scored. That's good, but not great. And several of the O's offensive players have been treading water in the second half. The only offensive regular with a wRC+ over 105 in the second half is Manny Machado (121). Pedro Alvarez, a part-time player, is at 130. Besides them, Adam Jones (105), Chris Davis (103), J.J. Hardy (101), and Steve Pearce (98, pre-injury) are all around league average. Hyun Soo Kim (93) isn't far behind.
However, Mark Trumbo (82 wRC+, and a .181 BABIP) has taken a U-turn, while Matt Wieters (69), Schoop (65), Nolan Reimold (42), and Caleb Joseph (19) have all been bad at the dish. Drew Stubbs hasn't hit at all since joining the O's and was primarily added for his glove, while Michael Bourn has hit fine (with two early, surprising home runs propping up his numbers).
With the O's offense ranking just 10th in the AL in runs scored in the second half, perhaps it's not all that shocking that Buck Showalter has opted to get Bourn and Stubbs out there more at the expense of extra at-bats for Kim and Alvarez (since whenever Trumbo is at DH, it bumps Alvarez to the bench). But while the O's are in a good position -- tied with the Blue Jays for the top wild card slot -- a struggling offense down the stretch could make things uncomfortable.