CHICAGO — Dusty Baker and Ozzie Guillen, two old friends who know well each other and the rigors of postseason battles, embraced by the batting cage before Game 3 of the American League Division Series on Sunday. Baker, the Astros manager, is the only manager to take five teams to the postseason, but never won the last game the way Guillen did with the 2005 White Sox. Guillen, who last ran a game in 2012, works out of the line of fire in the less stressful role of studio analyst. The two of them enjoyed a laugh or three, until the typically salty-sounding Guillen turned serious.