Since returning from his unfortunate injury (not pictured), Kaz Matsui (pitcured) is 7-for-21 with seven runs scored and two steals. He's only 44.0 percent owned in Yahoo! leagues at the moment.
Matsui is hitting at or near the top of the Astros lineup, and you can expect him to deliver runs and steals at a useful rate. His batting average shouldn't be too painful, but it's worth noting that he was much better in Colorado last year than on the road.
Still, he's a player of interest in mixed leagues.
The 45.5 percent-owned Felipe Lopez is another middle infielder with stolen base potential. He's suddenly leading off for the Nats.
Can you tell I'm browsing for Polanco replacements? There's nothing worse than managing around a vaguely injured non-star.