Albion have completed their first signing this summer after Republic of Ireland international James McClean joined from Wigan Athletic.
The winger has signed a three-year-deal, with a further 12 months in the club’s favour, for an undisclosed fee after passing a medical at The Hawthorns.
Baggies boss Tony Pulis said he was pleased to have completed the signing of Wigan’s player of the season last term.
"He's got Premier League experience from his time with Sunderland," said the Welshman.
"James has had a couple of indifferent years with Wigan but he did well at Sunderland and we're very pleased to have him on board.
"I am absolutely confident that he can fulfil the potential to come back and be a big player for us.
"He's got pace, he's left-footed - so he gives us a good balance in the side - and he can score goals."
McClean, who has also previously played for Derry City, said it was an easy choice to join an established Premier League club when Albion came calling.
He commented: "I'm delighted. I've played in the Premier League before and not only am I back here, but I'm with a stable top flight club and one that wants to push on.
"Tony Pulis told me what his plans were, where I would fit in. It was all very positive. The Premier League is where any player wants to be.
"He also told me he has a great dressing room, it's been a stable club - but he's made it clear he wants to push this club on. I'm very ambitious. Everything about this move seems right for me - I'm very positive about it.
"Once the Albion came in this was a move I was keen to get done - this is a big club and a new chapter for me."
Will McClean be a success at The Hawthorns? Have your say at Baggies Banter.