Martin Pérez delivered seven shutout innings with one hit and 85 pitches, leaving Chicago with a 4-0 lead that the bullpen momentarily wrecked. Colson Montgomery homered, Kyle Teel went 3-for-4 with an RBI, and Lenyn Sosa and Mike Tauchman provided timely hits to build the early cushion.

But the eighth-inning collapse—Estevez yielding three runs, including a Massey two-run shot, and Brebbia surrendering the tying and go-ahead hits in the ninth—erased the gem. Pérez, 34, carries a 1-3 record with a 2.02 ERA and 32 Ks, while the Sox slide to 48-84, their season defined by bullpen fragility and a lack of late-inning protection.