Drysdale opened with 65 off just 35 balls and then helped take his side to a nine wicket win over Te Puke, with an unbeaten 35 from 19 deliveries.
Mount's new recruit Ben Pomare, who has moved across town from Tauranga Boys' College, finished his first day in green and gold with 30 not out.
The two other round four encounters see Element IMF Cadets favoured to dispatch Bond & Co Tauranga Boys' College and a Lakeland derby between GM Painters Lake Taupo CC and Bayleys Central Indians.
There should be a good scrap in the early afternoon round between New World Te Puke and Tauranga Boys' College with the winner claiming their first points of the T20 competition.
Mount Maunganui will be odds on to defeat Central Indians and Lake Taupo would have to produce a major surprise to lower the colours of Cadets.
Baywide Twenty20 at Fergusson Park
Round Three
New World Te Puke v Bond & Co Tauranga Boys' College; Carrus Mount Maunganui v Bayleys Central Indians; Element IMF Cadets v GM Painters Lake Taupo CC; Eves Realty Greerton the bye.
Round Four
Carrus Mount Maunganui v Eves Realty Greerton; Element IMF Cadets v Bond & Co Tauranga Boys' College; GM Painters Lake Taupo CC v Bayleys Central Indians; New World Te Puke the bye.
Points
Greerton 12, Mount Maunganui 12, Cadets 6, Lake Taupo CC 6, Te Puke 0, Central Indians 0, Tauranga Boys' College 0.