In an interleague series against the Houston Astros in June 2010, Posada became the first Yankee since Bill Dickey in 1937 to hit a grand slam in back-to-back games. On July 23, 2010, Posada recorded his 1,000th career RBI against the Kansas City Royals. Posada finished the 2010 year batting .248 with 18 home runs and 57 RBIs. The Yankees went into the postseason again but lost to the Texas Rangers in the 2010 ALCS.