The Wylie softball team stayed perfect in District 4-5A play Thursday, using a big fourth inning to break a 3-all tie and eventually beat crosstown rival Cooper 7-4 at Bulldog Field.

After scoring one run in each of the first three innings, the Lady Bulldogs erupted for four runs in the fourth — all with two outs — to build a lead they would protect the rest of the way.

The victory improved Wylie to 18-4 overall and 2-0 in league play, while Cooper fell to 1-2 in District 4-5A action with its second loss to a crosstown rival this week.