Duke lefty Marcello Mastroianni brings starter’s build and bullpen swing
In the 2026 season, Duke’s Marcello Mastroianni has flashed usefulness as a left-handed arm with starter-sized traits at 6-foot-3, 195 pounds, and he already picked up a win in a 10-5 Duke victory over Appalachian State. He transferred from Georgetown with a résumé that included a 4.02 ERA, 47 strikeouts in 62.2 innings, and a track record of throwing strikes and handling real workloads. The downside: his 2026 Duke sample is still small, so he profiles more as a depth piece with upside than a finished product—useful, competitive, and worth watching.
