09/11/2012 07:35 am ET Updated Nov 11, 2012

Path To The MLB Postseason: Sept. 11, 2012

The White Sox and A's both absorbed solid blows from division rivals recently, calling into question their ability to finish strong in the chase for the playoffs. Both shrugged off any suggestion of lagging momentum to win payback from those same opponents on Monday.

Tuesday will feature the beginning of several series featuring playoff contenders, none more crucial than the Rays' three-game set with the Orioles, who lead Tampa Bay by one game for the second AL Wild Card berth.