The former Crystal Palace midfielder has found first team opportunities at the Latics somewhat limited under Roberto Martinez. He moves to the Hawthorns following weeks of speculation that Jason Koumas was a target of the Baggies.
Koumas however is believed to be happier on the bench at the Latics than taking a slight pay cut to play football everyweek. This news comes hot on the heels of Newcastle also announcing that they are not interested in the lazy 30 year old.
Speaking to the West Brom official website, Baggies boss Roberto Di Matteo said: “Having lost Gonzalo Jara for the remainder of the season to injury, we have been looking to strengthen the central midfield area and we are very pleased that Ben has joined us.
“Ben is very good technically and is a competitive player who knows the Championship very well. He has played many times at this level and knows what is required, which should help him to hit the ground running.”
The Latics have the option to recall Watson after one month of the loan agreement has elapsed. He joined Wigan from Crystal Palace for a fee of £1.5 million last January.