Former Hibs ace Efe Ambrose joins St Johnstone
The Nigerian joins on a free having been released from Livingston at the end of season following the expiry of his deal.
Callum Davidson has sought to strengthen his defence after losing Jason Kerr and Liam Gordon.
Kerr joined Wigan Athletic in a six-figure deal on deadline day, while Gordon has recently suffered an injury.
Ambrose, formerly of Celtic, is the third centre-back to be signed by Saints, alongside Lars Dendoncker and Hayden Muller.