Anthony Gose, Blue Jays: Nobody has been hotter on the bases than Gose, as he's collected six steals during the past week, giving him a total of eight during the month of August. Gose is still struggling a bit with the bat (.208), but is hitting .250 during the past week so there is hope that he's finally turning the corner.
Darin Mastroianni, Twins: Denard Span is missing his sixth straight contest on Monday night due to shoulder issues, clearing the way for Mastroianni to see continued at-bats. He's been great all season on the bases, going 14-for-16 in stolen base attempts, all in part-time duty. If he ever got the chance to be a regular, he'd have a chance at a 50 steal season.
Jose Tabata, Pirates: With Starling Marte landing on the disabled list, it appears Tabata will have another crack at proving his worth in the majors. He was 2-for-7 in his return, and was caught stealing twice, with the good news being that he's active and looking to make things happen on the bases. He could be a sneaky play for those in need of steals over the course of the next two weeks.
Eric Young, Rockies: Young is thriving in regular duty in August, batting .406 with three homers and three steals. He's always had elite wheels, but has rarely gotten the chance to put them on display regularly. Remember, he swiped 27 bases in just under 200 at-bats last season, so the upside here is enormous.
Erick Aybar, Angels: Finally healthy, Aybar has been heating up recently, especially during the past week (.346, 2 HR, 2 SB). With four steals already in August, we may finally be seeing the speed that allowed him to tally 30 during the '11 season. At 41 ownership at Yahoo, he's likely freely available in your league.