Houston took 2 of the 3 to win the first series with the Tigers this season. So to be assured of a tiebreaker advantage, the Tigers need to sweep. Winning 2 of 3 would put the Tigers in good shape though because the 2nd tiebreaker is one’s record within one’s own division, even when the tie involves teams from separate divisions. Right now, the Tigers’ record against the AL Central is much better than the Astros’ record against the AL West.