Chris Chiaradio collected three hits, while Fortin and Alescio drive in a pair each in the Pirates' win.
Zach Prendergast pitched six strong innings and Weigel hit his first career home run in the loss.
Seton Hall collects 17 hits and steals 12 bases in snapping a five-game losing streak.
Seton Hall's skid reaches five games as the Musketeers sweep Saturday's double-header.
The right-hander allowed just one unearned run in the sixth inning, but the Pirates lacked offense.
2015: Made 16 appearances and made three starts... Went 0-4 with a 4.64 ERA in 33.0 innings pitched... Struck out 23 batters and walked 19... Opponents hit .244 off him... Pitched a scoreless inning vs. Creighton on May 23 in the BIG EAST Championship... Pitched 4.2 innings in relief and gave up just two earned runs at Villanova on May 8... Pitched a scoreless inning with one strikeout vs. Butler on April 17... Threw a scoreless inning at Xavier on April 4... Earned his first career save at Xavier on April 2... Pitched a perfect inning vs. FDU on March 29... Threw four innings of one-run baseball in relief vs. Lafayette... Pitched a scoreless inning vs. Saint Peter's on March 18... Made his collegiate debut with four innings of two-hit baseball at North Carolina on Feb. 14... BIG EAST Academic All-Star.
High School/Personal: Attended Liberty High School in Bethlehem, Pennsylvania... Two-year letter-winner as a right-handed pitcher and outfielder... Named team captain as a senior... Named First Team All-Conference and All-Area in 2014... Named Third Team All-Area in 2013... Named Cy Young of the team in 2014... Pitched two career no-hitters... Pitched to a 1.55 ERA with 85 strikeouts in only 54 innings as a senior... Led Liberty to a pair of third-place finishes and a combined 30 wins in two seasons... Participant of the Norco Legion All-Star Game... Member of the National Honor Society and graduated with high honors... Member of the Fellowship of Christian Athletes... Born Sept. 25, 1995.