Angel Pagan has just been activated by the Mets and already has a stolen base to his credit; and Eric Young has been recalled (finally) by the Rockies.
Pagan was likely dropped in all shallow leagues and a good bit of mixed leagues after he stumbled mightily out of the gate, but now it's a fresh start in a sort of can't-lose situation. He hit sixth in the order in his debut from the disabled list, which means some RBI opportunities as well if it lasts.
Young has or will soon have dual 2B/OF eligibility in all leagues, as the Rockies are playing him in center field for the struggling Dexter Fowler. I will assume he will also see some playing time in the infield after Jose Lopez was finally and mercifully cut from the roster. I think Fowler and Jonathan Herrera will see a decrease in playing time.
Both of these guys are capable of stealing 20-plus from here on out... so if you have the need, they have the speed! Good luck!