Alexander Stuart "Jock" Sturrock MBE (14 May 1915 in Melbourne – 11 July 1997 in Noosa Heads) was a noted Australian yachtsman who won over four hundred international, national, state and club championship yachting races.

Although defeated 4 to 1 by Weatherly, Gretel's victory in the second race was the first by a challenger since 1934, and is widely recognised as the first of the events that resurrected the America's Cup as an international sporting competition.

He also skippered Dame Pattie, Australia's second America's Cup challenger, in 1967, which was beaten 4–0 by the highly controversial defender Intrepid.

In February 1942 he was seconded as a liaison officer to HQ 3rd Division 2AIF, and subsequently trained for long-range specialist reconnaissance, intelligence gathering and sabotage behind enemy lines.

It also included a 6-week period in July/August 1943 when he was promoted in the field to Major and traversed the Bitoi River Track with a native carrier to act as Senior Liaison Officer with the United States Army's 41st Division 162nd Regiment at Nassau Bay.

As the direct result of his army service, Jock was hospitalised on five occasions: once for a broken ankle during training in Queensland, and in PNG twice for Dengue Fever, once for a concussion received when a US reconnaissance plane he was in crashed in the jungle between Nassau Bay and Wau, and finally for a broken leg received when a suspension bridge over the Bitoi River collapsed during a night-time crossing.