The Minnesota Twins announced today that they have agreed to terms with designated hitter Ruben Sierra on a one-year contract with an invite to Major League Spring Training. Sierra, 40, batted .229 (39-170) with 14 runs scored, 12 doubles, four homers and 29 RBI in 61 games with the New York Yankees last season. The four-time American League All-Star has 15 career multi-homer games and has hit nine grand slams since he made his major league debut in 1986. Sierra's 306 career homers rank sixth on the All-Time list for homers by a switch-hitter.