Manager Torey Lovullo says Iannetta is "doing OK" a day after being struck Friday night by a 93 miles per hour pitch from Pittsburgh's Johnny Barbato.
Iannetta fell to the ground immediately and eventually walked off the field with towel over his nose.
The Pirates and Diamondbacks have had issues in the past, including a year ago when Pittsburgh reliever Arquimedes Caminero hit Jean Segura and Nick Ahmed on their heads during a game.
Lovullo, though, said he thought "the pitch (that hit Iannetta) just got away from their pitcher".
Catcher Chris Iannetta left the game in the bottom of the seventh inning after getting hit above his mouth with a pitch from Pirates reliever Johnny Barbato.
"The bats have been a little quieter than usual lately", said Ahmed, who also doubled, was intentional walked and scored twice Wednesday.
"His slider's been very good with late action in the hitting zone", Lovullo said.
Opening day is a couple weeks away and several Tucson Saguaros ball players still need a place to call "home" for the 2017 season, which gets underway at Kino Sports Complex May 25. After being hit, he was replaced behind the plate by Chris Herrmann.
Sensex, Nifty hit lifetime highs on normal monsoon forecast
Market breadth remained negative as 1583 stocks closed in the negative, 1,247 stocks finished higher and 162 remained unchanged. The shares of the mid-cap and small-caps showed good trade as indices of both were up, approximately to a percent each.
After breaking up Zack Greinke's no-hitter with an eight-inning homer Thursday, Polanco had a single, a double and two RBIs, and his looping double down the left-field line in the first inning drove in the Pirates' first run.
Back in 2014, Diamondbacks slugger Paul Goldschmidt was hit by Ernesto Frieri of the Pirates in August and missed the rest of the year with a broken hand.
That's when he made a diving catch of a ball hit by the Pirates' Andrew McCutchen in the opening inning. I think he is. His home run highlighted a seven-run third inning. A 93-mph fastball running up and in and virtually no time to react.
Drury also doubled and singled to improve his batting average at home to.448 (30 of 67), best in the majors.
Iannetta is now batting just.220 with 3 home runs and 6 RBIs on the season.
Bell's two-run homer in the fourth inning was his sixth of the season and brought the Pirates within four at 7-3, but Arizona scored four runs off reliever Josh Lindblom in the fourth inning to regain control. He is 2-1 with a 2.49 ERA in four starts against Arizona, and he won his only starts at Chase Field, giving up one run in 7 1/3 innings on April 24, 2015.
"That was scary", Pirates catcher Chris Stewart said.