Altuve stole just seven bases in 221 at-bats in his debut season in 2011 and has been refining his running game with experience. He's also worked on getting better jumps and reads with first-base coach Bobby Meacham.
"The season has moved along, and he's really found out when to run, when not to run and who he can run against," manager Brad Mills said. "He's progressed with that very nicely, and he's been able to pick what pitchers and what times to run, which is big."
Altuve stole a base in four consecutive games last Sunday through Wednesday, becoming the first Astros player to do that since Bourn in 2011 and the first Houston second baseman since Craig Biggio in 1994. Altuve ranks 10th in the NL and first among NL second basemen with 25 steals.