LaRoche signs one-year deal with Diamondbacks

PHOENIX (Reuters) - First baseman Adam LaRoche has signed a one-year contract with the Arizona Diamondbacks with an option for the 2011 season, the Major League Baseball team said on Friday.

Although financial details were not disclosed by the club, local media estimate the deal to be worth $4.5 million.

"Adam has been a very consistent performer throughout his career," Diamondbacks general manager Josh Byrnes said in a statement. "He will improve our offense and help provide left/right balance to our lineup."

LaRoche, 30, hit .277 with 25 home runs and 83 RBI in 150 games for the Pittsburgh Pirates, Boston Red Sox and Atlanta Braves last season. He has a career average of .274 after six years in the majors.

(Writing by Mark Lamport-Stokes in Los Angeles, editing by Tony Jimenez)