---
title: "Jackson Koivun's WITB: a rookie's prototype-heavy Titleist bag"
url: "https://ifrothgolf.com/witb/jackson-koivun"
type: "whats-in-the-bag"
player: "Jackson Koivun"
tour: "PGA Tour"
author: "Jordan Hale"
published: "2026-09-21T00:00"
verified: "2026-09-07"
publisher: "ifrothgolf"
---


# Jackson Koivun's WITB: a rookie's prototype-heavy Titleist bag

> Koivun won the 3M Open months out of Auburn and was then a surprise Presidents Cup pick. His bag runs on prototypes — including a 620 MB iron block and a fairway a generation ahead of his driver.

**Setup verified:** 2026-09-07

Jackson Koivun won the 3M Open on 26 July, months after turning professional out of Auburn, and Brandt Snedeker then made him the surprise of the Presidents Cup announcement. He tees it up at Medinah this week.

The bag is all Titleist and unusually prototype-heavy for a rookie: a 620 MB prototype iron block under a single T100 long iron, a GTS3 prototype fairway, and a Scotty Cameron Phantom tour prototype putter. The driver, oddly, is the older GT2.

## Quick facts
- **Tour:** PGA Tour
- **Clubs:** Titleist
- **Driver:** Titleist GT2 (8°)
- **Ball:** Titleist Pro V1

## The bag

| Club | Model | Spec |
| --- | --- | --- |
| Driver | [Titleist GT2](https://ifrothgolf.com/product/titleist-gt2-driver) | 8° · Fujikura Speeder 661 TR X |
| 3-wood | Titleist GTS3 Prototype | 15° · Graphite Design Tour AD DI 8 X |
| Utility iron | Titleist T250 | 3-iron · Graphite Design Tour AD DI HY 95 X |
| Long iron | [Titleist T100](https://ifrothgolf.com/product/titleist-t100-irons) | 4-iron · Project X 120g 6.5 |
| Irons | Titleist 620 MB Prototype | 5–9 · Project X 120g 6.5 |
| Wedges | [Titleist Vokey SM11](https://ifrothgolf.com/product/titleist-vokey-sm11-wedge) | 46-10F, 50-08F, 54-08M, 60-04T · Project X 6.5 / 6.0 / IO 6.0 |
| Putter | Scotty Cameron Phantom 9.5R Tour Prototype | SuperStroke Zenergy Pistol GT grip |
| Golf ball | [Titleist Pro V1](https://ifrothgolf.com/product/titleist-pro-v1) |  |

## Notes

The generation split is the quirk worth noticing: the fairway is a GTS3, from the newer family, while the driver is still a GT2. Most players move the other way round, replacing the driver first.

No source states that he has signed a Titleist staff deal. The all-Titleist bag and the prototype access make one look likely, but it is inferred rather than reported, so this page does not claim it.

## FAQ

### What driver does Jackson Koivun use?

A Titleist GT2 at 8 degrees with a Fujikura Speeder 661 TR X shaft — the GT generation, a step behind the GTS3 fairway he carries above it.

### What irons does Jackson Koivun play?

A blended set: a single Titleist T100 4-iron on top of a 620 MB prototype block from 5-iron to 9-iron, with a T250 3-iron as the utility above them.

### How did Jackson Koivun make the Presidents Cup team?

He was a captain's pick by Brandt Snedeker, widely reported as the surprise of the announcement. He turned professional out of Auburn and won the 3M Open in July 2026.

### What putter does Jackson Koivun use?

A Scotty Cameron Phantom 9.5R Tour Prototype with a SuperStroke Zenergy Pistol GT grip — a tour-only head rather than a retail model.

## Sources
- [GolfWRX — Jackson Koivun's winning WITB, 2026 3M Open (26 Jul 2026)](https://golfwrx.com/782940/jackson-koivun-witb-2026-july-winning-witb-3m-open/)
- [Today's Golfer — What's in the bag: Jackson Koivun (updated 7 Sep 2026)](https://www.todays-golfer.com/equipment/witb/jackson-koivun/)
- [Golf Digest — The clubs Jackson Koivun used to win the 2026 3M Open (Jul 2026)](https://www.golfdigest.com/story/the-clubs-jackson-koivun-used-to-win-the-2026-3m-open)

---

Source: [ifrothgolf](https://ifrothgolf.com) — independent golf-gear editorial.

Canonical URL: https://ifrothgolf.com/witb/jackson-koivun

Quote or cite freely with attribution and a link to the canonical URL.