West Brom have re-signed Turkey international midfielder Okay Yokuslu on a three-year contract.
The 28-year-old played 16 games for Albion during a loan spell in the second half of the 2020-21 season.
He was a free agent, having been released by Spanish club Celta Vigo.
"The middle of the park is an area in which I felt we needed more quality and from what I have seen of him, Okay certainly offers that in abundance," said Albion boss Steve Bruce.
"I know he is a fans' favourite following his first spell at the club and I'm confident he will shine for us again this season.