ZACH Tuohy has become the second Blue to request a move on the opening day of the NAB AFL Trade Period, with the defender seeking a trade to Geelong.

The Blues have had a three-year deal on the table for Tuohy for some time, but the 26-year-old resisted re-signing amid keen interest from the Cats and North Melbourne.

The Kangaroos are understood to have offered Tuohy a four-year deal for considerably more money than the Blues' deal, but AFL.com.au can confirm Tuohy has settled on Geelong as his preferred new home.

Tuohy is not a free agent so Geelong will have to broker a trade with Carlton to secure him.

Carlton confirmed Tuohy's trade request to Geelong in a statement on Monday afternoon.

"The club had offered Zach a three-year deal and he has chosen to explore his options. We remain committed to adhering to our list management plan and the offer was in line with that strategy," head of football Andrew McKay said.

"We will now work with Zach and his management to ensure an appropriate deal can be arranged in the best interests of the Carlton Football Club."

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The Irishman joins Bryce Gibbs in seeking a move from Ikon Park, with Gibbs, who is contracted until 2019, signalling he wants to join Adelaide.

Tuohy has played 120 games since joining the Blues as an international rookie ahead of the 2010 season.

• Key dates for the NAB AFL Trade Period

The 187cm defender enjoyed a career-best season in 2015 that saw him named on a back pocket in the AFL Coaches' Association team of the year and finish third in Carlton's best and fairest award.

Tuohy enjoyed another strong season this year, finishing seventh in the John Nicholls Medal count after averaging a career-high 20 possessions a game.

He also finished third at Carlton for rebound 50s (91) and fifth for inside 50s (64), while he racked up a personal-best 35 possessions against Hawthorn in round 19 and starred with 25 disposals and three goals a round later against St Kilda.

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Tuohy was recruited from County Laois in Ireland's midlands region and made his AFL debut against Port Adelaide in round 11, 2011.

He has not missed a game since round one, 2013, and his run of 90 consecutive games is the longest active streak at Carlton and fourth in the AFL behind Sam Gibson (108), Nathan Jones (97) and Dane Rampe (95).