The Wisconsin TimberRattlers have locked up a playoff spot for the first time since 2005, clinching the Midwest League's Western Division first half title with a thrilling 5-2, 10 inning victory over the Beloit Snappers Sunday at Fox Cities Stadium.  Yadiel Rivera delivered a walk off, three run homer for the win.  Wisconsin needed a Kane County loss to wrap up the division title and they got it.  The Rattlers improved to 40-23, good for a four game lead over Beloit.  They'll finish the series and the homestaed with a 12:05 PM matinee at Time Warner Cable Field on Monday.