Strikeforce announced Couture's opponent Wednesday as well as the main event featuring Caros Fodor against James Terry.
Couture (2-0) began his professional MMA career at Strikeforce Challengers 10 last August, submitting Lucas Stark with a triangle choke in 75 seconds. His second fight this past February took a little longer, but also resulted in a submission when Couture finished Lee Higgins with a rear-naked choke in the third round.
Ricehouse (4-0) began fighting professionally in January 2010 and has competed twice on Strikeforce undercards. His wins have come by two TKOs, a submission and a decision.
Here's the rest of the Strikeforce Challengers 16 lineup, airing live on Showtime at 11p.m. ET.
Caros Fodor vs. James Terry
Ryan Couture vs. Matt Ricehouse
Lorenz Larkin vs. Gian Villante
Antwain Britt vs. Danillo Villefort
Julia Budd vs. Germaine de Randamie