The Adelaide Crows and GWS Giants will both unearth debutants in Round 9.

Young midfielder Adelaide Ronin O'Connor will play his first AFL game against West Coast on Sunday, while the Giants debut academy graduate Keiren Briggs will get his opportunity against Richmond on Saturday night.

O'Connor, 20, was selected by the Crows with pick 42 in the 2019 AFL Draft from WAFL club, Claremont.

Standing at 191cm and weighing 85kg, O'Connor is known as an inside bull who has a great knack of winning the contested footy.

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Representing Western Australia in the 2019 under-18 championships, O'Connor averaged 13.8 disposals and 5.5 tackles per game en route to helping WA take out the championships.

In his past three SANFL games, O'Connor has averaged 21 disposals, 13 contested possessions, seven clearances and seven tackles per game, which was good enough to earn a first senior call-up.

Meanwhile, Briggs, 21, earns his first senior call-up after solid form in the VFL and will become the fourth debutante for the club this season.

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Flourishing with the Allies during the under-18 National Championships, Briggs was selected with Pick 34 in the 2018 draft by the Giants.

Standing at 200cm and 107kg, Briggs has an ability to be a tap ruckman as well as a key forward.

During the 2018 National Championships for the Allies, Briggs averaged 13 disposals, 5.8 tackles and 24 hitouts per game.