Dominguez pitched a perfect ninth inning and recorded his fifth save of the season in Monday's 6-4 win over Atlanta.
The right-hander appears to be interim manager Rob Thompson's top choice as closer, collecting three of the Phillies' last four saves, with Brad Hand securing the fourth. Dominguez has certainly earned the role -- since the beginning of June, he's posted a 1.65 ERA, 0.73 WHIP and 20:4 K:BB through 16.1 innings -- but his success may not dissuade the team from trading for a more established ninth-inning option at the deadline.