Serwinowski is the most intriguing name the Dodgers acquired. A 21-year-old left-hander who was ranked as the No. 10 prospect in the Reds’ farm system by MLB Pipeline, the former 15th-round draft pick has been a favorite of Dodgers’ evaluators for a while, according to another person with knowledge of the team’s thinking.

Dave Roberts stared out at the visiting bullpen Friday night and into uncertain territory. The Los Angeles Dodgers manager has overseen a relief unit that has logged more innings than any team in baseball.