Kilmarnock manager Kenny Shiels has added another two players to his squad following the arrival of Gary Harkins from Dundee on Monday.
Cameroonian Patrick Ada, a 26-year-old centre-half or full-back, was released by Crewe in the summer and has agreed a two-year deal.
Also moving to Rugby Park until then is Daniel Racchi, previously of York City, who had been at the club on trial.
Before, the 23-year-old midfielder was at Huddersfield, Bury and Wrexham.
Ada made 42 appearances for Crewe last season and was available on a free transfer, while Racchi fell out of favour at Crewe after joining them in January.
His requested for a move to a new club was granted immediately.
Meanwhile, the club has announced new deals for goalkeepers Cammy Bell and Kyle Letheren and defender Ryan O'Leary.