Southampton have confirmed Jay Rodriguez will sign for West Brom for an undisclosed fee believed to be up to £15 million.
The one-time England international, 27, will bolster a West Brom attacking line-up that struggled to score consistently last season having signed a four-year deal with the Baggies.
Former Burnley forward Rodriguez leaves St. Mary's Stadium having scored 26 goals in 104 appearances since his arrival on the south coast in 2012.
His best Premier League return came in 2013-14, when he scored 15 goals, but injury has meant he has struggled to reproduce such form in recent years.
"Rodriguez departs after five years at St Mary’s, moving to the West Midlands to seek more regular first-team football," the club said in a statement on Sunday.
"The forward arrived at Saints from his hometown side of Burnley in 2012. He went on to make a total of 126 appearances and scoring 35 goals in his time with the club.
"Everyone at Southampton Football Club would like to thank Jay for his hard work, dedication and the significant contribution he made to our success over the past five years. He leaves with our very best wishes for the future."
Rodriguez becomes West Brom's first signing of the summer and will battle with the likes of Salomon Rondon and Hal Robson-Kanu for a place in the starting XI.