The 21-year-old centre-back, who has represented Republic of Ireland from under-17 to under-21 level, joined the Magpies' youth set-up in 2017 and scored on his debut for United's second-string in January 2019.

The Irishman spent the 2021/22 campaign on loan at Scottish Championship outfit Greenock Morton, making 28 competitive appearances for the Ton as well as netting the first goal of his senior career during a 1-0 away win at Partick Thistle in February.

The young defender, who was named on Newcastle's first-team bench for a pre-season friendly victory over Doncaster Rovers in July 2021, will link up with the Saddlers on Friday, 1st July following the expiration of his contract with the Magpies.

Everyone at the club would like to wish Oisín the best of luck for the future.