Grant O'Brien

@CoachOB_AZ

Assistant Coach @ASUFootball
AZ Born | @NAU_Football & @PVTrojansFB HS Alum | Coached 🏈
Northwestern, Purdue, Illinois, Mizzou, FIU, ACU, NAU

Tempe, AZ sundevils.com/sports/mens/fo… Joined May 2014

791 Following 10K Followers 2.2K Posts

Latest posts 5

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Grant O'Brien @CoachOB_AZ May 13

#ForksUp /// #ActivateTheValley

PHNX Sun Devils Verified account @PHNX_SunDevils May 13

Have you considered Arizona State? 🔱

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Grant O'Brien @CoachOB_AZ Sep 29

1st of Many! Let’s Go 31
@DillonThieneman

Chicago Bears Verified account @ChicagoBears Sep 29

First NFL INT for the rook 🙌

📺: ESPN

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Grant O'Brien @CoachOB_AZ Apr 26

Congrats to @DillonThieneman
The @ChicagoBears got a good 1…
So proud of what You’ve earned!

Grant O'Brien @CoachOB_AZ Mar 6

#ForksUp /// #ActivateTheValley

Sun Devil Football Verified account @ASUFootball Jan 21

New chapter. Same standard. Presenting the 2026 Sun Devil Football Schedule ⤵️

🔗: thesundevils.com/news/2026/1/20…

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Grant O'Brien @CoachOB_AZ Dec 27, 2025

Great finish w/ a bowl win @NUFBFamily
Happy Holidays!