Who was Jake Arrieta calling out on Twitter?

This is the show. We have certain expectations here. That's why you don't play.

— Jake Arrieta (@JArrieta34) September 1, 2015

@JArrieta34 tossing shade at castro

— Owen Tweardy (@Br0wen) September 1, 2015

@JArrieta34 pic.twitter.com/sQrhrp8JmN

— Nick Sanders (@nick_uh_liss) September 1, 2015

@JArrieta34 This can't be about Starlin. He only had 3 errors yesterday... Now if it were 4 then I'd say it's well deserved. #WelcomeJavier

— Amused Ape (@RobZee79) September 1, 2015

@BrianMPaul could be James Russell or Soriano. Both DFA'd today

— Anthony Reed (@GingerKing_668) September 1, 2015

@JArrieta34. Maybe this is talking about James Russell...DFA today.

— Tyler Johnson (@tyjohnson12309) September 1, 2015

Was meant for a fan who said E should be H RT @JArrieta34: This is the show. We have certain expectations here. That's why you don't play.

— Jesse Rogers (@JesseRogersESPN) September 1, 2015

Jake arrieta meant to @ a fan who questioned the scoring decision in his no hitter. So stop assuming dumb things now

— Garrett Tinsley (@ItsjUstG_05) September 1, 2015