"I asked if that was a typo," Iannetta said. "Then I asked if they were trying."
Iannetta hit a pair of doubles and homered while driving in a career-high seven runs to lead the D-backs to a 15-3 win and a sweep of the three-game series.
"It was great, it was exciting, it was fun," Iannetta said. "These are the days you play baseball for -- the chance to contribute and have fun while doing it. You feel like a kid doing it."
D-backs manager Torey Lovullo had thought about putting Iannetta in the spot in front of Paul Goldschmidt. Finally, Thursday, he decided to trust his gut.
"My conversation was brief with C.I. about what he was going to be doing today, but I felt like it was going to be the right situation to hit in front of Goldy and try to impact the game," Lovullo said. "I just felt like it made a lot of sense."
Iannetta grounded out to third in each of his first two at-bats before hitting a two-run homer in the fifth that erased a one-run deficit and gave the D-backs the lead for good. He followed that with a three-run double in the sixth and a two-run double in the eighth.
All told, Iannetta came to the plate with six runners on base, and he drove them all in.
"You hit in front of one of the best hitters in the game, you know you're going to see some pitches to hit, which is great," Iannetta said. "It's a boost of confidence to know that all you have to do is just pick one out. You know you're going to get a bunch of opportunities to hit with guys on base and get some pitches over the plate, because they don't want to face him, they'd much rather face me."